I made temporarily a scenery.cfg containg besides the default sceneries as addon only my FSDT and Cloud9 products, which are PHLI, PHTO, PHKO, PHOG, PHNL, KDFW, KORD_V1, kLAX_V2, KJFK_V2, CYVR, LSZH, LSGG, KMCO, ENBR, XCITY-ROME. All such sceneries get the TRIAL-messaqge but result ACTIVE in the Addon Manager and do NOT disappear after 5 minutes. All FSDT product with QLM-key, all Cloud9 with original key at purchase.