Use PaintDOTnet to open/edit and convert webp into any other format that paintDOTnet supports, all this using Windows 10. You don't need to install a plugin for that, because WebPFileType.dll is already built-in on the most recent version of PaintDOT net.[...]
Ohhh, well... i do not have a Win 11
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If you're using Windows 7 then you're out of luck (and you'll have fewer possibilities).