Triggering this bug is rather unlikely, but can be achieved by

• installing gpgol/web and completing the setup, including initial pairing of web and native client
• removing the gpgol/web native client config files

On the next start, both web client and native client can connect to the proxy, but not to each other. web client shows "Unable to find GpgOL/Web native client." Up to this point this is expected, however there is currently no way out of the situation, because the "Unpair" button erroneously stays disabled in this case.

In addition to fixing the button, it may make sense to point to it in the troubleshooting documentation.