I have GE 7.1.8.3036 (Earth Pro) working from Basecamp on two 64 bit Windows 10 machines.
I had to do the registry trick shown above on one of the machines.
I also have things working with the registry trick but on a Win7 64-bit system. However, I needed to make a slight change in this part of the instructions:
It's interesting to note that Garmin Support states the latest release of GE function no longer works with BaseCamp...
https://support.garmin.com/faqSearch/en-US/faq/content/go8phBi0Lt6nSjgcTpm4r8
However Garmin neglected to date or list the GE or BaseCamp versions this applies to. How useful is that?
Which probably means that Garmin will remove that menu function from BC one day hence messing up those of us who still use it with a previouis GE version. Shame!
I have no problems using the latest Google Earth Pro (7.1.8.3036 (32-bit)) with the latest Basecamp (4.6.2) on two different Windows 10 PCs.
I did have to apply the /RegServer patch a while ago after an update.
I thought Google had resolved this but maybe not. Anyway, try this method:
From the Command Prompt type the following as applicable and press ENTER:
(Make sure you are in the C:\ root directory)
"C:\Program Files (x86)\Google\Google Earth Pro\client\googleearth.exe" /RegServer (works with Google Earth Pro in Win 7...10)
"C:\Program Files\Google\Google Earth Pro\client\googleearth.exe" /RegServer (Google Earth Pro in XP)
"C:\Program Files\Google\Google Earth\client\googleearth.exe" /RegServer (Google Earth in XP)
"C:\Program Files (x86)\Google\Google Earth\client\googleearth.exe" /RegServer (Google Earth non-Pro on Win 7, 8.x and 10)
Note for those not used to using the command line in Windows, the double quotes in all of the examples are critical. They MUST be there and in the indicated places or you'll get an error that the directory name is invalid. It won't harm anything; it simply won't work.
Just a quick thank you. I followed your instructions to add
"C:\Program Files (x86)\Google\Google Earth\client\googleearth.exe"
It worked.
Now on to the next thing to figure out.