Update 1.4 :

• 15 Electrical connectors :
  
  - IEC 320 C2
  - IEC 320 C6
  - IEC 320 C8
  - IEC 320 C10
  - IEC 320 C16
  - IEC 320 C18
  - IEC 320 C20
  - IEC 320 C24
  

• Overall tweaks :
  - Lots of ports have been revisited to be more accurate and modeled based on technical drawings.
  - Higher resolution per decal (they now occupy most of the 1024*1024 texture space).
  - The golden connectors color and roughness is now unified throughout the decals (when applicable).

Update 1.4.5 :

• Some more ports have been revisited to be more accurate and modeled based on technical drawings.
• 2 new ports (HDI 30 and DC-In 5V)
• Bonus :  70+ logos and texts.
  

Yes, Decal Machine is always updated and maintained for the latest Blender version.

Simply run the updater (a one click solution) in the add-on preferences, and your decals will be ready.

Yes, why not.

I did my best to give you the most commonly used ports, but I did not cover all of them out there.

Just reach out to me and I'll probably add your request to the list of already available ports.