Need help installing old software on new computer [View all]

My 10-year-old Windows 7 machine finally started showing signs of imminent death, so I bought a new computer. (Windows 10 is every bit as horrible as I'd heard, but it is what it is.)

Unfortunately, I'm having trouble installing my old software onto my new machine, and I have a couple of questions that I'd greatly appreciate help with.

The software that I had disks for (WordPerfect), I just reinstalled on the new machine. This worked fine.

However, software that was downloaded and out-right purchased (MailWasher, Fast Photos) now wants me to repurchase it. When I copied the files over from my Win7 machine, I just copied them onto my Win10 computer, then ran the .exe file. While both of these programs run, they now act as if I just downloaded them as a free trial and they both require a new purchase. I'm assuming that the way I copied them over and then ran them isn't the way I should have done this. Is there a way to make this work without buying a new license?

Also, I did have a DVD of my Excel 2000 (yes, a very old Excel!), but I can't find it now. Copying all the files from the old machine onto the new one, then running excel.exe, gave me absolutely nothing. Any ideas of what I should do? There are some executable files besides excel.exe; is one of them the one I should run?

I greatly appreciate any help anyone might be able to give me. Thanks in advance!