Hi,
I have Zoiper5 5.2.14 installed on my Windows 10 machine and I wanted to test something on the first setup, but my phone was already set up, so I removed it (uninstalled and restarted PC as required), and then reinstalled the program and it got all my settings (extension, contacts, etc) back.
Is there an official way (I know I can scrub Windows of all leftovers) to completely uninstall and start freshly without anything from before?