Here you have a link for that older version from which you are trying to upgrade to 1.0.35 based on what I read there is or was some bug in the installer that it needed older installer to uninstall the older version and installer newer one. So if it asks again for file “spacedesk_driver_Win_10_64_v109_BETA.msi” download the older installer of the version you are trying to replace. I’m including you official link to that older installer so it can uninstall that older version https://spacedesk.net/downloads/spacedesk_driver_Win_10_64_v109_BETA.msi
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