GSX worked perfectly for me from the date I bought it and downloaded it. I loved it! When I was prompted to update the addon manager just the other day, I went along with it. I was completely dismayed that, following the update, FSX Acceleration was crashing to desktop. I was also dismayed that my computer now decided, while loading FSX, that FSUIPC was a suspicious program. I was also dismayed that, when I had followed advice given in these forums, that vehicles were missing and/or disappearing. I was also dismayed that I now have to remove some of the "free airport sceneries" that I used successfully BEFORE the update in order to get at least some part of GSX to work again in FSX.
I have followed every instruction that I can find in the forum, I turned off my virus program, I removed one of the airport sceneries that I use, I reinstalled FSUIPC and edited the config as suggested, I have done everything I can to make this installation successful including reinstalling GSX. It's all been in vain because whatever I do GSX is still not working as it did before the update.
Being a software user, rather than a clever programmer makes me less able to get into the depths of it all and, since it worked perfectly for me before the update with no changes to my setup, I am dismayed to find that I now have to remove GSX and the Updater in order to get my FSX back the way it was. That is of course, the way it was before GSX.
I hope that you come up with an answer to this issue, there seem to be a lot of people with complaints and questions.