Export and Save As should be the same menu item with an option in the dialog.
There are many many more but start with the app having the overbearing assumption that it thinks you want save to its file format rather than make an ad hoc edit.
That “overbearing assumption” is made by practically every other X-media editing app, for good reason — you can save your work and continue/revert stuff later. If all you’ve ever used is MS paint then I guess it’s an unexpected thing, but any other image/video editing app, digital audio workstation, 3D modeling software, etc… work exactly the same way. It would be unexpected to me if “save as” exported a flat file.
That “overbearing assumption” is made by practically every other X-media editing app, for good reason — you can save your work and continue/revert stuff later. If all you’ve ever used is MS paint then I guess it’s an unexpected thing, but any other image/video editing app, digital audio workstation, 3D modeling software, etc… work exactly the same way. It would be unexpected to me if “save as” exported a flat file.