Looks to be crashing when loading presets....
Are you (all) using a myevents.txt file for your own personal presets? If so, can you try temporarily renaming that so it is not loaded? There is an issue if a duplicate preset name is encountered in your myevents.txt file: FSUIPC will try and rename any duplicate preset names found, based upon the vendor and aircraft name from the previous comment line. If there is no previous comment line, then FSUIPC7 will crash. I will correct this (and the preset will be ignored if it cannot be renamed), but if you are using a myevents.txt file, make sure that you have a comment which defines the vendor and aircraft. The comments for presets should be in the following format:
//<vendor>/<aircraft>/<system>
(#where <system> is optional). Some examples:
//PMDG/B737-700/Controls
//Asobo/A320/Lights
//Cockspur/Mustang C510
All presets following such a comment are grouped together, until the next comment is reached - and it is these comments that allow the presets to be display in the tree display when clicking the 'Find Preset...' button.
If its not that, can you please try the 7.5.6d beta release (available from the News section) to see if you get the same issue with that version.
