They aren’t a minority, and the lack of a fix really has nothing to do with how important it is. The old version you are testing was created using a programming system that existed long before screens had high resolution. There is no good way to solve all of the problems with it.
I’m not sure if the thread you found was mirroring this information, but these are the best tips we can provide.
Now if you’d like to see what we’ve been working on for the past few years, with modern technology, then have a look at the soon to be released beta version. If you find that works better for you, you may just want to consider that you base to start from, rather than learning the old version. Like I say, it’s almost done, and it would be a free upgrade for you anyway.