Don't CLick Yes. I got a little message when I tried to load like FFGs 737-700, saying this aircraft has features that this version of FS may not support, blah, blah,blah, and asks if you want to disable these features? If I clicked Yes, all the animations(gear, flag, alierons, etc) would not work. If I clicked no, the worked fine.

Not good advice. It worked in this case but others won't. I have tried it on some aircraft and the sim locked. Came to conclussion that if an aircraft gives this message best to uninstall it until an upgrade is available.