Did you manage to find the game folder? I'm not certain where it might be for Windows 7 if you haven't, but you could try here:
C:\TMOTM\data\
If it isn't there, check your Documents folder for a "TMOTM" sub folder, or try running a file search.
Then, if you have downloaded the file to your desktop, add it to your save game folder for TMOTM. I believe that there are restricted save slots, so you may need to renumber or write over an existing file.
Let us know if you still have problems.