Annoying problem about app custom settings being discarded at app shutdown

#1
Hello, this is my first post in this forum. As stated in the topic title, the last three update (as far as i can remeber, at least!) came with a potentially nasty behaviour. Anytime i shutdown the app, whatever custom setting i've inputted in that session goes dumped. Neither administrator run nor app (or even OS!) reinstall on either system and non-system folders solved the problem. I'm currently using v7.39.2x64 with just ffdshow_rev4531_20140628_x64 codecs installed (video related) on a Win10 1909 x64 machine (which worked more or less flawless in previous releases). Please, help me.