Sorry to hear about your troubles KC. Its not altogether helpful to say; but we all get these setbacks in our turn, however we sincerely sympathise with you.
Also had cats and they were all characters - much missed.
On top of all that your video card (the most expendable thing at the moment!!!) continues to function.
Don't think you wasted your cash on SF though it will be usable for a long while yet, my version runs on WinXP (32 bit) and Win7 64 bit so its flexible and won't age overnight. At worst it can wait until you get upgraded but I would urge you to download a couple of updates/patches (minimum the PzIV sight reticle and the widescreen mod/patch) to make sure you have all you need as and when.
All the Best Mort