I guess this will be a topic for many Users who are collaborating with other Affinity users still on V1. I have both versions of the Affinity suite, and am a bit hesitant to edit v1-documents because of the incompatibility with v1-apps. Is there any way to somehow "save as" or "export" v2-documents from the v2-app to the v1-document-format, perhaps with a friendly warning that one might lose some new features?
Otherwise this would be a weird situation, Designer can open Illustrator files from all versions (which Illustrator cannot do), but cannot export into its very own format of the predecessor...
Btw: Copying from V2 and paste it into V1 seems to work, even the controls for a cog shape still works.