No link to update plugin

[pulmol36]

Hello,

I am user of volumio with a:

raspberry pi 3
dac isabre v3
A power led button

I find a plugin
( https://github.com/JedS/Raspdac)
to manage power button.
But when I go on plugin area in volumio, the link update plugin doesn't exist.

How can I do?

(I tryed a gpio plugin but nothing change on my button)

Thanks by advance for your reply.