So I am so new to this but please understand. I pulled my original file off of my 2014 ML Bluetec and got it loaded. When I go to save the file it says "Used Map without checksum calculation, do you wish to continue" I have tried to do the checksum detect but that doesn't work. What do I do?

It also appears when I go to save it will make progress then the program with just be closed and I cant find anything saved in any folders.