After reconsidering the potential sources of the different behavior of the versions, I suspect it might simply be due to the fact that the experimental version apparently launches and runs with administrator privileges, whereas the current stable version—like Gremlin too—launches and runs under the standard Windows user account. If my suspiccion is true, actually there is no need to do anything or something to fix beside the fact, that it would be convinient to circumvent the issue in the experimental version -while this is not realy necessry for the experimental brunch as long as it works in the following stable version as it is.

I made a small but crucial typo in the previous comment. : "In the current stable version the game does not recognizes..." Should be: " In the current stable version the game does recognize ..." (not not 🙂 )

just checked it... if i deny administrator rights when starting arma reforger experimental at start of the game, everything works as expected. so - sorry- there isn't a problem but launching arma reforger with administrator rights in windows. 😕

Maybee marke it as solved instead of wasting time in investigating the issue