How to download the Hughes XF11A into FSX.? Can't load it.
2 Answers
Follow this step by step and it will show you how.
https://forum.flyawaysimulation.com/forum/topic/33358/how-to-install-aircraft-in-fsx/

You may also find this page helpful:
https://flyawaysimulation.com/knowledge/page/34/installing-addon-flight-simulator-downloads/
There are some walkthrough videos that are usually very helpful.
Chief Captain