No issues with GSX running with P3D v4.5 HF2 but after a complete rebuild of my rig with Win10 Pro v1903 and a new install of my FSDT products, I'm now getting the following messages when I try use FSDT Live Update:
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Checking if Visual Studio 2013 Runtimes x86 is required (don't worry, if it's already installed or you already have a new version, it won't be reinstalled or downgraded).
DOWNLOADING Visual Studio 2013 Runtimes x86 files
DOWNLOADING file C:\Users\xxxxxxxxx\AppData\Local\Temp\vcredist_2013.zip.001
CREATING Visual Studio 2013 Runtimes x86 .ZIP archive
Removing temp file C:\Users\xxxxxxxxx\AppData\Local\Temp\vcredist_2013.zip.001
EXTRACTING Visual Studio 2013 Runtimes x86 .ZIP archive
Removing temp file C:\Users\xxxxxxxxx\AppData\Local\Temp\vcredist_2013.zip
Checking if Visual Studio 2005 Runtimes x86 is required (don't worry, if it's already installed or you already have a new version, it won't be reinstalled or downgraded).
DOWNLOADING Visual Studio 2005 Runtimes x86 files
DOWNLOADING file C:\Users\xxxxxxxxx\AppData\Local\Temp\vcredist_x86_6195.zip.001
CREATING Visual Studio 2005 Runtimes x86 .ZIP archive
Removing temp file C:\Users\xxxxxxxxx\AppData\Local\Temp\vcredist_x86_6195.zip.001
EXTRACTING Visual Studio 2005 Runtimes x86 .ZIP archive
Removing temp file C:\Users\xxxxxxxxx\AppData\Local\Temp\vcredist_x86_6195.zip
Checking if Visual Studio 2015-2019 Universal Runtimes x64 is required (don't worry, if it's already installed or you already have a new version, it won't be reinstalled or downgraded).
DOWNLOADING Visual Studio 2015-2019 Universal Runtimes x64 files
DOWNLOADING file C:\Users\xxxxxxxxx\AppData\Local\Temp\vc_redist.zip.001
CREATING Visual Studio 2015-2019 Universal Runtimes x64 .ZIP archive
Removing temp file C:\Users\xxxxxxxxx\AppData\Local\Temp\vc_redist.zip.001
EXTRACTING Visual Studio 2015-2019 Universal Runtimes x64 .ZIP archive
Removing temp file C:\Users\xxxxxxxxx\AppData\Local\Temp\vc_redist.zip
Checking if Visual Studio 2015-2019 Universal Runtimes x86 is required (don't worry, if it's already installed or you already have a new version, it won't be reinstalled or downgraded).
Completed
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I cleared out my temp folder. Re-ran the update. Attached is the 3 log files that were generated (I combined them all into 1 file).