Oh, Jeez, another conspiracy hawker. Start reading the forum. Most, if not all, of your issues have been explained in the past.
Start off by terminating QCef.exe using your Task Manager. That will solve your uninstallable running program. QCef is the browser portion (hardly hidden) of StreamFab which on rare occasions gets stuck running if StreamFab has been improperly shutdown.
Your application repeatedly asks for and attempts to run the latest update, but it consistently fails.
As has been discussed here a gazillion times, NEVER, EVER, use the online updater. It fails in some way, a good percentage of the time. This has been known for years. Only use the offline updater, easily found in the "sticky" section at the top of this forum.
Unless you were one of the few who purchased the DRM Video Downloader All-In-One (early version of StreamFab) prior to March 10, 2021, that was the deal. You got all future non-adult modules for free. If you purchased after that date, you had to pay for any released adult and non-adult modules after that. It is all documented in this forum as it happened. If you did not take advantage of that early deal, then that has nothing to do with you.
As for resolution problems, StreamFab can only download what is made available to it by the streamers. Give specifics and we'll go over what is available by individual streamers and/or production companies.
By the way, nobody gives a shit what you recommend or don't. Of course, it is "most likely illegally practicing software application development". That's why you bought it (or obtained a crack). If the streamers offered a true unhindered download feature, you wouldn't have gone looking for such a program. So, in that regard, you are just as culpable by being part of the conspiracy.