Flatpak bundles of #Meshy have been discontinued. They served well at the beginning to quickly provide a single-click install option, but they aren't so handy in the long run because they don't provide an update mechanism.

From now on please use the flatpak repo: https://meshy-app.org/#install
It also includes the aarch64 version now (thanks to @rosti for providing the build machine!)

If you have installed the bundle, you have to reinstall the app to start receiving updates.