Are you up to date with the current version, 3.3.9 at the moment? If not, use Help > Check for Program Updates.
If you are on the latest version, I'd like to see a crash log (a file with technical details about the crash written by your Mac every time a program crashes). Depending on the version of the Mac OS, it may be in ~/LIbrary/Logs/CrashReporter or ~/Library/Logs/DiagnosticReports. To find these folders, you can use the Finder's Go > Go to Folder... menu command, and paste in ~/Library/Logs/DiagnosticReports or ~/LIbrary/Logs/CrashReporter. The file name will include FrameForge and the date of the crash. Please send it to me as an attachment to an e-mail or private forum message.