Hi @keycookie17,
Please try to uninstall the previous version 1.0.33 via Troubleshooter program here:
https://support.microsoft.com/en-us/help/17588/fix-problems-that-block-programs-from-being-installed-or-removed
Run the “MicrosoftProgram_Install_and_Uninstall.meta.diagcab”, select Uninstalling.
If “spacedesk Windows DRIVER” is not on the program list, just select “Not Listed” then paste the product code of spacedesk_driver_Win_10_64_v1033_BETA.msi here: {A3F7D2C7-F3B2-40CD-B236-37BA2CDACA1D}
After that, please try again to install the latest spacedesk msi installer from the website.