I did a full system file search that had anything with the letters BB in them and also did a registry search for the same letters, and I found that a windows uninstall did not remove any files left behind, so I went ahead and used Revo Uninstaller which first runs the default uninstaller used by the program, which in this case the BIAB uninstaller, then it scans the entire system and registry for any leftover files that the uninstaller didn't remove, probably because of files created by BIAB during the course of using it, then Revo would show a list of registry entries that I can delete in bulk, then it shows a list of actual files related to the software, on the system (if any) that also can be deleted in bulk. I did all this, then rebooted the PC, and re-installed a complete clean installation of BIAB, and after re-installing some of the paks I had,the fills now work as they should.

So basically it seems that the default windows uninstaller or any apps uninstaller is not to be trusted and to use a 3rd party uninstaller that completely removes everything that's related to the program being uninstalled.

Well, it seems it's all fixed now, thanks for everyone's help.