I have the latest version of The Bat! with on-the-fly encryption running on Windows 7.  Everything has been fine until very recently one of the EBB files has started to grow massively by up to 1GB per day.  Since the file name is encrypted so I cannot be sure what folder it refers to but the biggest one (viewed from The Bat!) for that particular account is only 1500 messages. On other accounts I have far larger folders (3000+ messages) but no correspondingly large file.

The other peculiarity is that this file (and a number of others with encrypted names) is not in a subfolder (in Windows) but directly in the account folder.  Like my other accounts, when I view the database file structure in Windows I have a series of folders each with a MESSAGE.EBB and MESSAGE.EBN file but in no other accounts do I have files with encrypted names directly in the account folder itself, only a series of ACCOUNT files with different suffixes.  The only difference is that this is an IMAP account and the others are all POP3.

I already compress all files on exit so that is not the solution.  If necessary I can backup, uninstall and re-install The Bat! but before I do that I just wanted to see if anyone has any other ideas or solutions.  Thanks in advance for your advice.