Projekte mit Menumarken werden nicht mehr unterstützt

Generally Premiere Elements does not do backwards compatibility.

Opening a project made with an earlier version MAY work in a newer version (make a copy of the project first) but it may well not.

Creating a DVD has been removed, so there is no longer a menu function

If you are inside 30 days and you purchased from Adobe you may get a refund

Return https://helpx.adobe.com/au/x-productkb/policy-pricing/return-cancel-or-change-order.html
-https://community.adobe.com/t5/account-payment-plan-discussions/how-to-return-non-subscription-adobe-software/td-p/13040970