Good Morning, and Happy Tuesday, Vitalij!
Thank you for your question! The current method of upgrading Destination URLs to Final URLs with Bing Ads Editor is the best and easiest option available. However, in order for the update to apply to existing ad copies instead of creating new ones, an Ad ID column must be present in your spreadsheet.
There is a step-by-step process in this article, under the sub-section "Upgrade destination URLs to Upgraded URL's in Bing Ads Editor."
Should you have any questions or concerns, please contact our support team. We will be more than happy to assist.
I hope this helps! Have a great day!