WhiIe I’m writing this post a solution is already found but maybe it helps anyone with the same problem until it is going to be fixed. I exported my well working game but the .exe refused to work. For export I marked all checkboxes available and the .exe just crashed at the beginning. So I unmarked checkboxes for copying logic nodes folder and the game showed up at least in the .exe but refused to do anything that was scripted with logic nodes.
In the current version UPBGE creates a folder aside the project.blend containing the logic nodes scripts. This folder just needs to be copied aside the .exe and everything works.
Hope this helps.