Please try the Install/Uninstall troubleshooter program from the Microsoft Fix article *just click the link*.
Once you are in the Microsoft Fix article, just click the “Download troubleshooter” button, and it will download the MicrosoftProgram_Install_and_Uninstall.meta.diagcab, run it and select “Uninstalling”, if spacedesk is not on the program list, just select “Not Listed” then paste the product code of current spacedesk version below.
spacedesk_driver_Win_10_64_v107_BETA.msi:{4C833146-47C8-4A9C-B4B2-0D35B7BE5F81}