eM Client won't open after hard reboot

Had to do a hard reboot on my laptop and have been unable to open eM Client since!

Here is the error listed:
eM Client (4.0.15145.0)
Windows: Microsoft Windows NT 5.1.2600 Service Pack 3, Framework: 2.0.50727.3634
The following error has occurred:
System.Runtime.Serialization.SerializationException: Binary stream ‘110’ does not contain a valid BinaryHeader. Possible causes are invalid stream or object version change between serialization and deserialization.
at System.Runtime.Serialization.Formatters.Binary.__BinaryParser.Run()
at System.Runtime.Serialization.Formatters.Binary.ObjectReader.Deserialize(HeaderHandler handler, __BinaryParser serParser, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage)
at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize(Stream serializationStream, HeaderHandler handler, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage)
at MailClient.Accounts.Db.AccountCollection.DeserializeFromDb(Int32 id, Byte[] data)
at MailClient.Accounts.Db.AccountCollection.Load()
at MailClient.Accounts.AccountManager…ctor()
at MailClient.Accounts.AccountManager.Initialize()
at MailClient.Program.Main(String[] args)

There are three things you can do to remedy this situation:

  1. Go to Start -> Run and type the following:
    “C:\Program Files\eM Client\DbRepair.exe” /checkall
    or alternatively, if you use 64-bit system:
    “C:\Program Files (x86)\eM Client\DbRepair.exe” /checkall

  2. Download a tool from http://www.emclient.com/tools/DbRepai… and run it.

After this action eM Client should start up normally. If does not, you will have to delete the database and restore your data from backup.This will remove all your settings and local items though!

Database location:
C:\Users%Current User%\AppData\Roaming\eM Client (Vista/Win7)
C:\Documents and Settings%Current User%\Application Data\eM Client (XP)

If you do not have backup file this might be a problem (you can learn a lesson from that), but you can try following trick: Leave the error message (if possible) open and go to Settings -> General -> uncheck “Send and receive messages at startup” -> restart eM Client -> export all your emails, contacts, tasks end events.
I hope it will help.