corrupt mail_index.dat

I am running Windows 10 64bit and get the following error reported by the database check tool - I am running Avira Free Antivirus (if that’s relevant):
System.Data.SQLite.SQLiteException (0x80004005): database disk image is malformed
database disk image is malformed
   at System.Data.SQLite.SQLite3.Prepare(SQLiteConnection cnn, String strSql, SQLiteStatement previous, UInt32 timeoutMS, String& strRemain)
   at System.Data.SQLite.SQLiteCommand.BuildNextCommand()
   at System.Data.SQLite.SQLiteCommand.GetStatement(Int32 index)
   at System.Data.SQLite.SQLiteDataReader.NextResult()
   at System.Data.SQLite.SQLiteDataReader…ctor(SQLiteCommand cmd, CommandBehavior behave)
   at System.Data.SQLite.SQLiteCommand.ExecuteReader(CommandBehavior behavior)
   at System.Data.SQLite.SQLiteCommand.ExecuteNonQuery()
   at System.Data.SQLite.SQLiteConnection.Open()
   at MailClient.Storage.Data.DataStore.GetConnection(String relativeName)
   at DbRepair.CorruptionChecker.CheckCorruption()
   at DbRepair.FormCheck.Check(Object state)
I have re-installed emClient v7 and it still does the same thing.
Please help as this is only the first week since installing em Client  and it does look and feel Soooo much better than Thunderbird! Thanks

This is the exact same problem I’m getting and I wish there was a response from the company!

I’m thinking the ‘simple solution’ is to blow away the whole of the roaming emClient folder and start again (assuming that you have an email provider that doesn’t delete your emails), then immediatey set the database storage location to somewhere that is easy to find (like on another hard disk) and then set the backup to point to another disk and set it to run every day - at least that way, you’ll have something to go back to!

John have you managed to sort this I have the same problem

sorted it
click on File explorer
click on >widows
Click on >users
click on >user name
click on>app data
click on > Roaming
you should then see EM client delete it then reload it it should then work

That did it!
After uninstalling the program, deleting the folder and restarting the PC, I was able to do a clean re-install.
It reported that the database folder was directed elsewhere and I chose to use the default location and it then worked.
I then imported everything from Outlook and we’re up and running.

Many thanks for your help