Please, if you use ANY of the localizations (DE, CS, FI, FR, PT, RU, BG…), check whether the texts are sane (“About Avast” menu item).
Thanks for testing,
hallo,
under normal circumstances, the package will overwrite old files at their rightful places, and thus, will 1:1 replace the older version completely.
so, there’s no need for uninstalling… but you can do it, if you want to… :).