Change "Save As" Logic?

In all of the software I frequently use the"Save As" option (to save in a different format to the source file) works a little differently to Musescore. Once I select the desired format from a drop-down list the filename extension changes to the selected one and I just need to click "Save" to save the file in that format. In Musescore when I select the desired format from the drop-down list the filename extension doesn't change. I have to erase it manually before I hit "Save" otherwise I get a message telling me the file already exists.

Not a biggie obviously but a little frustrating at times - or is it that most of my other software is "non-standard" in this respect?