How do I mark all addons as uninstalled?

[Spinball]

As per the title. Or how do I find all the addons I have installed, so I can manually uninstall each one?
Thanks.

[Paul M]

<a href="https://vborg.vbsupport.ru/vborg_miscactions.php?do=showinstalled" target="_blank">https://vborg.vbsupport.ru/vborg...=showinstalled</a>