Can't start on-premises SharePoint sync with Groove.exe

[Bruce Weatherford]

I have the old OneDrive for Business (groove.exe) and new nextgen sync client (onedrive.exe) both instaled on my computer.  But when I click the "Sync" button on my on-premises SharePoint 2013 site the Groove.exe does not startup up to configure the sync.  Instead the OneDrive.exe starts up and prompts me to login.  And of course when I do that it says I am already logged in and should sign in using a different account.

Any idea why Groove.exe is not starting up automatically?  I am wondering if it's because I ran OneDrive.exe /takeover a while back and even though that should not change on-premises sync perhaps it's related?

Thanks, Bruce...

[#2]

Have you tried to start the sync from Groove, adding manually the library?

[#3]

Yes, doing that works.  But shouldn't clicking "Sync" start Groove.exe automatically?  It seems to do that for one of my co-workers.