I am writing more in the hope that a correction will be made so that I can install GlassWire where I want and where it worked until today, than in asking for immediate help.
I just downloaded and attempted to install version 2.1.152. The previous version was on my SSD (D:). The installer noted this and attempted to re-install on that drive. I got an error message that the file gwdrv.sys could not be copied. The source file c:\windows\system32\drivers. The file is present in that location. If I cancel and try the install without the file, GlassWire cannot contact the local server and will not start.
I gave up and installed this version on my C: drive without issue. I do see my existing data, so that is not an issue.
Any thoughts on how I can reinstall on the D: drive? Manually copy the file after the installation?