updates change the instruments and sounds in my saved musescore files

I am a great fan of musescore - it has changed my life. Having said that, with each recent update (I just downloaded the latest 3.0.1.5807 update for example) - it annoys me to find that when I open a saved musescore file - for example with a cello, or a clarinet - the sound fonts I had carefully selected and deliberately saved with the previous version are now changed! And that is whether I "reset the position of all elements" or not, as the opening pop up window in the new version recommends. This is totally frustrating. (Hey I realize the creators of Musescore are saints and benefactors of mankind, but I'm just saying)
I am really glad that installing the Musescore 3 didn't overwrite my Musescore 2.3.2 because if I open the same file there the cello font I selected still sounds wonderful. In the new Musescore I now have to try and refind the original cello font - and that's also a problem. There are at least two cello sound fonts on my list and both are called simply 'cello'. But I find it and ok. It's annoying but apparently solvable.
But now I open up a piece with a Bb Clarinet and first in playback there is just silence - then I see in the Mixer panel the Clarinet is set to Yamaha Grand Piano!!?? What's happening???? If I open the same file in 2.3.2 the instrument is Woodwinds- Clarinet Solo (from FluidR3Mono_GM2-310.SF2). What is this all about? I open up the 'patch' search (which in the previous version was called more obviously 'sound' - why this change?) and whereas in 2.3.2 you could see how far down you were in the list, with the new version you are scrolling blind. And whereas my Woodwinds - Clarinet Solo was at the bottom in 2.3.2 in the new version I have no idea where it is. It appears that there are two "Clarinets" and neither is as beautiful as my original one. I'm not sure I understand what is going on here. My Sound font sources are apparently the same but the sounds they generate aren't???
At this point I think I will probably continue to use the older version which I am very comfortable with. At least until this gets fixed... This doesn't alter my admiration for the Musescore Creators!