After getting more info from Johannes offline, we figuered out the root cause of the error: Johannes have installed CS6 pre-release Folio Builder panel on the same machine.
All the regular release builds are implemented to be backward compatible with previous release builds. However release builds are not guaranteed to work with CS6 pre-release builds and there have been incompatible changes introduced between pre-releases. So when user upgraded to latest release panel, Folio Builder panel detected the offline cache database to be in an incompatible state which caused the 3115 error. The incompatibility of pre-release builds are expected and the solution is to delete local cache folder. If you ever would want to switch between using CS6 pre-release build and CS5 release build on the same machine, you should also delete your offline cache folder before switching.
If you are just like Johannes that you've had pre-release bits installed on the same machine then you should definitely clean up the cache folder. However if you have always only installed release build of Folio Builder panel on that machine but still encounter database error, please feel free to contact me offline and I may help to investigate the issue.
Thanks!
Jianlan
