If you have FrameForge 4 on Catalina but it won't run, that that means you haven't updated to the latest version and you can simply run WebGrabFF4 to update it, as per the instructions in the second paragraph above. If you're running an OS PRIOR to Catalina and see the following message (or something like it) then you do not need to be concerned as Apple has been aggressively pushing all developers to produce 64 bit applications and is giving this warning on any application that is still 32 bits despite the fact that they still run fine on OS's PRIOR to Catalina.

Unzip it and move the new version into your FrameForge program folder, replacing the old version of WebGrab-FF4 and then run it from there. NOTE: If you have one of the very early releases of FrameForge 4 prior to it being updated to 64 bit and you need a 64 bit version of Webgrab to update it, then you can download it here.

Prior Version of FrameForge are 32 bit applications and are NOT compatible with Catalina. FrameForge Version 4 is a 64 bit application and is fully compatible with Catalina.

Frameforge 4