www.makemkv.com

Never had an issue with this program before. Hadn't used it in a few months, then went back to it, found out license was expired. Bought it again. Now that I'm back, it won't let me make anything more than ISO files, and those are USELESS to me!!! I was always able to create an MKV instantly, without issue. What's changed??

MakeMKV's purchased license does not expire, just the beta license. Getting an expiration notice from MakeMKV would mean that it's operating with the beta license, not your purchased key. You should re-apply the purchased key, especially if it doesn't match the key MakeMKV is using.