Hi Pete,
I recently uninstalled FSX:SE and removed all left over data in the AppData and ProgramData folders in order to start over with a fresh new installation of FSX:SE (I did not clean the registry, which I now regret). Unfortunately I have run into an issue with the FSUIPC installer I've never experienced before. Here's a full copy of the install log:
I have searched for a solution on the internet, but none of the cases I found matched my situation (most of them involved having FSX and FSX:SE coexist, or at least having been installed once on the same system, which is not the case here). Hence I am reaching out to you.
Is there anything I could do to resolve this without tinkering with file paths and names?
On another interesting side note, the installer somehow found a reference to Prepar3D v3 in the registry even though I've never used Prepar3D before (I don't even have a license for it). I've let FSUIPC fix that though.