[SOLVED] Ventoy UPdate

[VentoyMic]

On an USB-Stick with ventoy 1.0.27, I have a bunch of systems, partially with persistence, that I do want to keep.
I'd appreciate your guidance how to update from a LINUX-based system; after reading several posts here I'm more confused as before. I was thinking about

Code:

sudo Ventoy2Disk.sh CMD -u /dev/sdX

but

• what to download .tar.gz or ISO?
  
• where to store that package?
  
• what else is important?
  

Thank you!