Unable to start application even after re-install

Please see error below. Please note i have uninstalled em client completely, even deleted registry entries and folders but when i re-install the error is the same… Please advise.

eM Client (6.0.23421.0)
Windows: Microsoft Windows NT 6.2.9200.0, Framework: 4.0.30319.42000
The following error has occurred:
System.ArgumentException: Customized cultures cannot be passed by LCID, only by name.
Parameter name: culture
   at System.Globalization.RegionInfo…ctor(Int32 culture)
   at MailClient.UI.Forms.formMain.UpdateCalendarSettings(Boolean afterstart)
   at MailClient.UI.Forms.formMain.InitializeGui()
   at MailClient.UI.Forms.formMain.OnLoad(EventArgs e)

" rel=“nofollow”>http://emclient.com/ns/report">;

eM Client
6.0.23421.0

false

Microsoft Windows NT 6.2.9200.0
4.0.30319.42000


System.ArgumentException
Customized cultures cannot be passed by LCID, only by name.
Parameter name: culture
mscorlib




mscorlib.dll
100675237
mscorlib
System.Globalization.RegionInfo
.ctor


mscorlib
System.Int32
culture



bc
3dfed0




MailClient.exe
100693283
MailClient
MailClient.UI.Forms.formMain
UpdateCalendarSettings


mscorlib
System.Boolean
afterstart



204
3e9




MailClient.exe
100693174
MailClient
MailClient.UI.Forms.formMain
InitializeGui


259
59e




MailClient.exe
100693158
MailClient
MailClient.UI.Forms.formMain
OnLoad


mscorlib
System.EventArgs
e



9c
194






MailClient.exe
C:\Program Files (x86)\eM Client\MailClient.exe
MailClient.exe
MailClient.exe
6.0.23421.0
eM Client
eM Client
6.0.23421.0
False
False
False
False
False
Language Neutral


ntdll.dll
C:\Windows\SYSTEM32\ntdll.dll
ntdll.dll
ntdll.dll.mui
10.0.10240.16384 (th1.150709-1700)
NT Layer DLL
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


MSCOREE.DLL
C:\Windows\SYSTEM32\MSCOREE.DLL
mscoree.dll
mscoree.dll
10.0.10240.16384 (th1.150709-1700)
Microsoft .NET Runtime Execution Engine
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


KERNEL32.dll
C:\Windows\SYSTEM32\KERNEL32.dll
kernel32
kernel32
10.0.10240.16384 (th1.150709-1700)
Windows NT BASE API Client DLL
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


KERNELBASE.dll
C:\Windows\SYSTEM32\KERNELBASE.dll
Kernelbase.dll
Kernelbase.dll.mui
10.0.10240.16384 (th1.150709-1700)
Windows NT BASE API Client DLL
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


ADVAPI32.dll
C:\Windows\SYSTEM32\ADVAPI32.dll
advapi32.dll
advapi32.dll.mui
10.0.10240.16384 (th1.150709-1700)
Advanced Windows 32 Base API
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


msvcrt.dll
C:\Windows\SYSTEM32\msvcrt.dll
msvcrt.dll
msvcrt.dll
7.0.10240.16384 (th1.150709-1700)
Windows NT CRT DLL
Microsoft® Windows® Operating System
7.0.10240.16384
False
False
False
False
False
English (United States)


sechost.dll
C:\Windows\SYSTEM32\sechost.dll
sechost.dll
sechost.dll.mui
10.0.10240.16384 (th1.150709-1700)
Host for SCM/SDDL/LSA Lookup APIs
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


RPCRT4.dll
C:\Windows\SYSTEM32\RPCRT4.dll
rpcrt4.dll
rpcrt4.dll.mui
10.0.10240.16384 (th1.150709-1700)
Remote Procedure Call Runtime
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


SspiCli.dll
C:\Windows\SYSTEM32\SspiCli.dll
security.dll
security.dll
10.0.10240.16384 (th1.150709-1700)
Security Support Provider Interface
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


CRYPTBASE.dll
C:\Windows\SYSTEM32\CRYPTBASE.dll
cryptbase.dll
cryptbase.dll
10.0.10240.16384 (th1.150709-1700)
Base cryptographic API DLL
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


bcryptPrimitives.dll
C:\Windows\SYSTEM32\bcryptPrimitives.dll
bcryptprimitives.dll
bcryptprimitives.dll
10.0.10240.16384 (th1.150709-1700)
Windows Cryptographic Primitives Library
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


mscoreei.dll
C:\Windows\Microsoft.NET\Framework\v4.0.30319\mscoreei.dll
mscoreei.dll
mscoreei.dll
4.6.79.0 built by: NETFXREL2
Microsoft .NET Runtime Execution Engine
Microsoft® .NET Framework
4.6.79.0
False
False
False
True
False
English (United States)


SHLWAPI.dll
C:\Windows\SYSTEM32\SHLWAPI.dll
SHLWAPI
SHLWAPI.DLL.MUI
10.0.10240.16384 (th1.150709-1700)
Shell Light-weight Utility Library
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


combase.dll
C:\Windows\SYSTEM32\combase.dll
COMBASE.DLL
COMBASE.DLL.MUI
10.0.10240.16384 (th1.150709-1700)
Microsoft COM for Windows
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


GDI32.dll
C:\Windows\SYSTEM32\GDI32.dll
gdi32
gdi32
10.0.10240.16390 (th1_st1.150714-1601)
GDI Client DLL
Microsoft® Windows® Operating System
10.0.10240.16390
False
False
False
False
False
English (United States)


USER32.dll
C:\Windows\SYSTEM32\USER32.dll
user32
user32
10.0.10240.16384 (th1.150709-1700)
Multi-User Windows USER API Client DLL
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


IMM32.DLL
C:\Windows\SYSTEM32\IMM32.DLL
imm32
imm32
10.0.10240.16384 (th1.150709-1700)
Multi-User Windows IMM32 API Client DLL
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


MSCTF.dll
C:\Windows\SYSTEM32\MSCTF.dll
MSCTF
MSCTF.DLL.MUI
10.0.10240.16384 (th1.150709-1700)
MSCTF Server DLL
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


kernel.appcore.dll
C:\Windows\SYSTEM32\kernel.appcore.dll
kernel.appcore.dll
kernel.appcore.dll
10.0.10240.16384 (th1.150709-1700)
AppModel API Host
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


VERSION.dll
C:\Windows\SYSTEM32\VERSION.dll
version
VERSION.DLL
10.0.10240.16384 (th1.150709-1700)
Version Checking and File Installation Libraries
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


clr.dll
C:\Windows\Microsoft.NET\Framework\v4.0.30319\clr.dll
clr.dll
clr.dll
4.6.127.1 built by: NETFXREL3STAGE
Microsoft .NET Runtime Common Language Runtime - WorkStation
Microsoft® .NET Framework
4.6.127.1
False
False
False
True
False
English (United States)


MSVCR120_CLR0400.dll
C:\Windows\SYSTEM32\MSVCR120_CLR0400.dll
msvcr120_clr0400.dll
msvcr120_clr0400.dll
12.00.52512.0 built by: VSWINSERVICING
Microsoft® C Runtime Library
Microsoft® Visual Studio® 2013
12.00.52512.0
False
False
False
False
False
English (United States)


mscorlib.ni.dll
C:\Windows\assembly\NativeImages_v4.0.30319_32\mscorlib\68b0897c4cade2a6a72889bff2bd0904\mscorlib.ni.dll
mscorlib.dll
mscorlib.dll
4.6.127.1 built by: NETFXREL3STAGE
Microsoft Common Language Runtime Class Library
Microsoft® .NET Framework
4.6.127.1
False
False
False
True
False
English (United States)


ole32.dll
C:\Windows\SYSTEM32\ole32.dll
OLE32.DLL
OLE32.DLL.MUI
10.0.10240.16384 (th1.150709-1700)
Microsoft OLE for Windows
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


uxtheme.dll
C:\Windows\system32\uxtheme.dll
UxTheme.dll
UxTheme.dll.mui
10.0.10240.16384 (th1.150709-1700)
Microsoft UxTheme Library
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


safemon.dll
C:\Program Files (x86)\360\Total Security\safemon\safemon.dll
safemon.dll
safemon.dll
8, 4, 0, 1340
360 Internet Security Internet Protection
360 Internet Security
8, 4, 0, 1340
False
False
False
False
False
English (United States)


SHELL32.dll
C:\Windows\SYSTEM32\SHELL32.dll
SHELL32
SHELL32.DLL.MUI
10.0.10240.16425 (th1.150802-1600)
Windows Shell Common Dll
Microsoft® Windows® Operating System
10.0.10240.16425
False
False
False
False
False
English (United States)


windows.storage.dll
C:\Windows\SYSTEM32\windows.storage.dll
Windows.Storage
Windows.Storage.dll.MUI
10.0.10240.16384 (th1.150709-1700)
Microsoft WinRT Storage API
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


shcore.dll
C:\Windows\SYSTEM32\shcore.dll
SHCORE
SHCORE.dll.mui
10.0.10240.16384 (th1.150709-1700)
SHCORE
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


powrprof.dll
C:\Windows\SYSTEM32\powrprof.dll
POWRPROF
POWRPROF.DLL.MUI
10.0.10240.16384 (th1.150709-1700)
Power Profile Helper DLL
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


profapi.dll
C:\Windows\SYSTEM32\profapi.dll
PROFAPI.DLL
PROFAPI.DLL
10.0.10240.16384 (th1.150709-1700)
User Profile Basic API
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


OLEAUT32.dll
C:\Windows\SYSTEM32\OLEAUT32.dll
OLEAUT32.DLL

10.0.10240.16384


10.0.10240.16384
False
False
False
False
False
English (United States)


PSAPI.DLL
C:\Windows\SYSTEM32\PSAPI.DLL
PSAPI
PSAPI
10.0.10240.16384 (th1.150709-1700)
Process Status Helper
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


WS2_32.dll
C:\Windows\SYSTEM32\WS2_32.dll
ws2_32.dll
ws2_32.dll.mui
10.0.10240.16384 (th1.150709-1700)
Windows Socket 2.0 32-Bit DLL
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


NSI.dll
C:\Windows\SYSTEM32\NSI.dll
nsi.dll
nsi.dll
10.0.10240.16384 (th1.150709-1700)
NSI User-mode interface DLL
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


NETAPI32.dll
C:\Windows\SYSTEM32\NETAPI32.dll
NetApi32.DLL
NetApi32.DLL
10.0.10240.16384 (th1.150709-1700)
Net Win32 API DLL
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


COMCTL32.dll
C:\Windows\WinSxS\x86_microsoft.windows.common-controls_6595b64144ccf1df_6.0.10240.16384_none_3bccb1ff6bcd1849\COMCTL32.dll
comctl32
comctl32.DLL.MUI
6.10 (th1.150709-1700)
User Experience Controls Library
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


wkscli.dll
C:\Windows\SYSTEM32\wkscli.dll
WKSCLI.DLL
WKSCLI.DLL
10.0.10240.16384 (th1.150709-1700)
Workstation Service Client DLL
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


srvcli.dll
C:\Windows\SYSTEM32\srvcli.dll
SRVCLI.DLL
SRVCLI.DLL
10.0.10240.16384 (th1.150709-1700)
Server Service Client DLL
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


netutils.dll
C:\Windows\SYSTEM32\netutils.dll
NETUTILS.DLL
NETUTILS.DLL
10.0.10240.16384 (th1.150709-1700)
Net Win32 API Helpers DLL
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


bcrypt.dll
C:\Windows\SYSTEM32\bcrypt.dll
bcrypt.dll
bcrypt.dll.mui
10.0.10240.16384 (th1.150709-1700)
Windows Cryptographic Primitives Library
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
False
English (United States)


CRYPTSP.dll
C:\Windows\SYSTEM32\CRYPTSP.dll
cryptsp.dll
cryptsp.dll
10.0.10240.16384 (th1.150709-1700)
Cryptographic Service Provider API
Microsoft® Windows® Operating System
10.0.10240.16384
False
False
False
False
F

Hi George,
your Windows regional settings are set to a format which cannot be handled by some .Net 3.5 functions, which eM Client needs to run.
Try changing the region settings of the operation system to a different LCID. The format can be changed in Control Panel > Region > Formats.

Best regards,
Olivia