I regret that you doubt me.
I haven't doubted you but, since you said you don't want to stop using the FSX Booster, I guessed you haven't haven't really tried it. Knowing if the issue changes with the program not running, would give me some hint about possible suggestions. Telling you to turn it off when just for TESTING.
Are they telling the lie?
The "background processing" they do, it's just acting on the FSX.CFG and being sure that, if you don't run the program, you won't find the changes applied to it when you exit. Is their way to protect the program: if the changes made to the FSX.CFG would have been permanent, you could just look at them from a similar PC (like a friend's one or another user with similar specs) and copy the tweaks in your FSX.CFG without buying it.
But in the end, it doesn't do anything really different than the free tool from Bojote
http://www.venetubo.com/fsx.htmlLook here too:
http://forum.simflight.com/topic/74786-fsx-booster-2013-no-improvement-to-bojotes-tweaks/I'd say you would get improvements from it if your FSX.CFG was bad to begin with. If your FSX.CFG is already optimized, it won't change much.
πquote]It is autogenerate new fsx.cfg by starting FSX, after removed old fsx.cfg. I remember that the fault of fsx might be repaired by this method. Do you think that it has an effect? [/quote]
You can try it, and run without the FSPS booster first. If it works, at least we would know is something related to the FSX.CFG