I've had an open ticket with support for a while, but thought I'd reach out here to check if this is common for every Win 10 desktop install, or just mine (same for all of my devices, so I have confirmed on multiple Win 10 installs).
Using a browser plugin, the License Key field within Software Licenses can be copied as needed; however when using the Win 10 desktop app it cannot; only options are paste and select all.
Desktop version is 4.5.2.0 - please let me know if this is a known issue or something that should be working properly based on your experiences.