There are potentially two "FYM folder"s. The one that is important is listed in File/Options/Game data location. Steps:
1. Install FYM on the new computer 2. Go back to the old install, see where "Game data location" is, then copy that folder. 3. Open the new install (give yourself a fake, temporary name), see where "Game data location" is, then close FYM and overwrite everything in that location with the old folder. 4. Open the new install.
* if you do this and are not asked whether you want to overwrite existing files, you did it wrong. * FYM should should know your real game name when you start up the new install after copying over data. If it does not, you did it wrong. * never do this if you have done anything in your new install as a registered player. Only do this in a new install.