.... it could be because in some of the config files there is an error. You find these files in the C:\Users\username\Documents\Aerosoft\ASUpdater\Products folder.    They should look like this: ?xml version="1.0" encoding="utf-8"?> <!-- DO NOT MODIFY THIS FILE! AEROSOFT SUPPORT WILL NOT HELP YOU IF YOU DO! --> <ASUpdater>   <ProductData Name="Aerosoft A318-A319 Professional" Platform="P3D5" AUID="as_a318_a319_prof_p3dv5" UseAddonXML="1" AddonName="C:\Users