I always enable macros each time it asked me................
Arrg.
OK. Let's try this:
1. Delete the entire directory where you installed STM.
2. Find the MSI file you downloaded from here and run it again.
3. When it asks you where to install the program, change the directory name so it's different from the one you just deleted.
4. Open Excel (not via STM, though ... just Excel by itself)
5. Under Tools...Addins, select the SimpleTourneyManager entry. If you did steps 1-4, you should receive a message stating that the addin can't be found, and asking you whether or not the entry should be removed from the list. Click "Yes" (or "OK", I can't remember which).
6. Under Tools...Macros...Macro Security, set it to Low (you can set it back to Medium later).
7. Close Excel.
8. Attempt to start STM from the Start Menu.
Excel should open, find that the Addin isn't available and install it, give you a message stating that the program was installed with default values, display the splashscreen (which should say that you are using the demo version and how many days you have left), then display the main program screen. Let me know where in the process you get the error message (hopefully, nowhere!).
I apologize for the trouble you're having with this. We'll get it figured out, though.