Users who have updated there installation of Microsoft's FS2004 to Version 9.1 via Microsoft's official patch may find that Flight Simulator will crash upon loading due the updated version of Flight Simulator being incompatible with the version of FSUIPC supplied with many of Just Flights products.
Please download an updated Version 9.1 compatible FSUIPC module from here and install according to the below instructions.
If you have any problems using the above link please paste the following address into your internet browsers address bar:
and download the file to your PC.
Once you have downloaded the FSUIPC update (version 184.108.40.206) you will need to copy FSUIPC.DLL file to the Modules folder within the FS9 directory. Its default location is C:\Program Files\Microsoft Games\Flight Simulator 9\Modules\
Simply highlight the FSUIPC icon that you have downloaded and either drag it into the Modules folder or use the Copy and Paste function. When prompted during copying the FSUIPC module into this folder, select the option to overwrite the existing file.
Easier method to update FSUIPC:
Alternatively, download the FSUIPC tool from here and run the program which will automatically update FSUIPC.