Sorry about all the troubles with 0.9.5.11. We have released 0.9.5.14 to fix the Windows 98 install issue and page not found/corrupted emalis.

Change History for Version 0.9.5.14 (29 December 2008)
- Fixed "Page not found" errors/corrupted emails introduced in 0.9.5.11.
- Fixed error handling with "new mail".
- Fixed installer error on win98.

Get it at SourceForge. Follow the Discussion Thread at the Forums.