Lately it barely ran, Win7, Win 10 and the new Win 11 Update . It would take several minutes to load and many of the features that I use on a regular basis didn't work, like SONG rendering ! I also noted that I may write a SONG FILE (SGU) and it was not listed as saved even though it was saved. It was driving me crazy for several days.
I read multiple GOOGLE discussions , tried many things all which did not fix or solve anything
except for ONE, the most obvious. MY bad

One discussion a guy ( not BIAB support) said, before we do anything go grab all the latest updates for your version from the BIAB website, point them to wherever you are running the program, for me its the hard drive BB Folder
15 min later the program is running just fine. It takes about 30 seconds to load the entire program and the RENDER options are working just fine. Do remember though that if we are RENDERING a file that has a combo of REAL TRACKS and MIDI tracks, it can take a few minutes. The very top menu bar will give an approx. TIME in MIN/Seconds along with progress.
While I am not the resident guru here, far from it, I should have known to perform the 2013 UPDATES without being told !

IF we are having issues, such as it worked fine not long ago , and now its behaving oddly, go grab the latest updates before you start chasing your tail, like I did !
I have owned this BIAB 2013 since, well, 2013, I never performed any updates and trust me on this, the LIST of included fixes, whatever, is HUGE !
Another thing of importance, PREFERENCES . When starting/loading BIAB, it may be preferred to NOT load the previous session or styles. Under preferences UNCHECK those boxes, let BIAB load to a clean canvas.
Another thing to be aware of, if we are using different PC's ( or Laptops) like I do, be sure the BBW shortcut path is correct for the PC you are using and the USB port the Hard drive or thumb drive is plugged into matches the shortcut path.