I installed the trial version today 2.26.17. I have FSX Steam Edition as the only FSX app. When FSX-SE is the only sim on a machine, Steam will create its Appdata folder in (Appdata path)/FSX not FSX-SE. The install created the DLL.XML file in FSX-SE. I had a heck of a time tracking this down. Is there anything else in FSX Appdata folder that is needed by P2A that it would be looking for in FSX-SE and not finding?