Feature request: new major Acorn versions should detect prior Acorn versions and offer to migrate automatically

[matthme]

When I run the acorn 9.4.1 AppImage without having gone through the "Update acorn" process with the acron 4.0.0 AppImage it does not recognize that there is already existing acorn data on disk and it starts with the prompt to set up my profile etc. It only works if I first open with acorn 4.0.0 then click on "Update" and then open acorn 9.4.1.

[Connoropolous]

Eric also thinks it should work that way. I consider this one more request for that, noted!