Proxmox 8.1.4 - Spice config files no extension

Just got spice working fine for a couple of VM's - but when I click console, spice and download the config file there is no extension.

(I can open the extensionless file with: remote-viewer nameofconfig file) in Terminal on my Macbook M1 (Ventura) and the Spice connection works fine) - just looking for a way to get the vv ext so I can use a helper automation to open remote-viewer automatically

thanks