eM Client repeatedly freezes and becomes unresponsive

I now want to try and restore a backup, does it matter if the backup is in a .rar folder or does it need to be extracted into a folder first?

If you have eM Client dated backup.zip files in your .rar file, or the eM Client hidden database folder backed up inside your .rar file then you can do a partial restore to restore measages.

See my post on the following thread how to do a partial restore from either of the above.