Hi and welcome!
First of all, welcome to the community. If you really want to jump in, come chat in discord - that's where we fling around most of the ideas that become features.
Secondly - and most importantly - I have those disks too! I loved some of those old tools, even if they were at times cumbersome.
To your requests (it's actually a few):
1) Copy monster makes sense and is fairly easy to do. In parallel I want to be able to create characters/NPCs derived from monster stat blocks, which all fits quite nicely in the same bucket. Consider it planned, although I don't know whether it is likely to land in v1.7 or v1.8 just yet.
2) The monster saving nonsense is crap, counts as a horrible bug in my books and needs desperately to be fixed. I'll put this at high priority! Thanks for bringing it up!
Happy gaming!