No, apparently I am! I'm having an idiotic moment. Actually, quite a few of them. I got so used to using the shortcut link that bypasses the CD to run this game that I completely forgot that the launcher opens as soon as you click on the regular Sims 3 icon on the desktop. Doh!
I am about to decide to completely forget trying to re-install all my previously games and downloads (except the package files in my mod folder, those will be easy to add) and just starting fresh. I was really curious to see if this PC could handle my laggy saved games but trying to re-create everything first is really getting too tedious! Thanks for pointing me back in the right direction, Coconnor.
No problem ... you're welcome! I know, I run it from 3-booter, so I only touch the desktop icon when I want the launcher.
ETA: If you have saved your "Saved Game" folder, just copy everything out of that file into your new "Saved Game" folder or replace the whole file with the old one and you can try to play your old game(s) on your new computer.