I solved this myself, but since there were so many that had same issue without an answer here's how i solved it.
AFAIK its the .dat file thats somehow corrupt, i was lucky to have a backup in hand. It may help to go through object builder to compile a new version. Directly changing to that file did not work, so some type of cache is still not being cleaned within the change, therefor i had to change to a clean version of 10.98 in this case, then back to my backup or newly compiled .dat & .spr -file. Whats important is that you do the changes in the introduction window, im pasting a image below so you know which im talking about. Go to preferences when you do these changes. Changing directly in the files or when map editor is open...