Live Stacking with Appimage

I’m using AstroBerry OS to take photos with a Raspberry Pi. I want to live stack these photos locally on my PC. Unfortunately, I’m encountering two problems and haven’t found a solution yet:

  1. Live stacking doesn’t respond when files are written to the monitored directory via rsync.

  2. I’m using an AppImage to run the latest version on Debian. I haven’t found a way to do live stacking via the command line (CLI) with this setup.

Is there a simple solution for doing live stacking locally?