I am trying to use TorBrowser as my primary browser.

To have it open links in emails I have followed Setting Tor Browser as default browser in Windows

That worked for a while. But now it does not work any more; now I get the same error as if I had not done the RegEdit: "Tor Browser is already running, but is not responding. The old Tor Browser process must be closed to open a new window."

TorBrowser has upgraded itself, but it is unclear to me if that was the cause.

Looking at RegEdit the command to run is still:

"C:\Users\ota\Desktop\Tor Browser\Browser\firefox.exe" -osint -url "%1"

And clicking a link also starts TorBrowser if it is not already running, so it seems the path is correct.

What could be wrong?

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