I think that I’ve nailed this one. The recent update was compiled using the most recent version of Max, but I neglected to update certain files which resulted in a crash when interacting with certain menus. Fortunately, only a couple of people downloaded that version of the installer, but if you were one the latest setup file fixes the issue (you can find this via the “downloads” section of your account). Sorry guys.
IMPORTANT: Before uninstalling an old version be sure to back-up any presets that you want to keep. These can be found in C:/ProgramData/Fragment_Flow/presets/. After installing the new version, you can then copy/paste those files back into that location.