How to run Mapthis on 5.50 Gen B

I treid everything already, but it still gives me error. I put mapviewer into Game150 folder, Game folder but to no avail. I doubt there's a Game550 folder for Firware 5.50 Gen B.

How shld I come about getting mapthis work on 5.50 Gen B?

Previously I was using 3.71 and everything works perfect. I only have to put mapviewer into Game371 folder and run it. But now I cant!

i have 5.50 geb B and mapthis works flawlessly... make sure you put the latest version of mapthis (0.5.20) and use the the 3.xx folder and MAKE SURE put it in you GAME FOLDER... NOT game 150 or game 370 etc.....