is there a way back? i didnt meant to activate dev and now i can use my key. i clicked on a button and didnt knew it would do this.
You need to use your actual license key.
You can do so by going to New Instance Defaults and entering the key there, then reactivate the local instances if needed.
Otherwise you can run ampinstmgr reactivate or ampinstmgr reactivateall to reactivate the specified instance(s) with the right key.