So some time ago i got the audirvana trial and barely used it because I begun being busy with work
The trial ran out.
I then got the roon trial and got trine to use it and loved it.
But before I would get either of these things... I'd like to try audirvana again but I can't as I allready used my 30days free
How can I get another trial (New email doesn't work) so I can actually listen this time and decide?
Go to the Audirvana forums. There is a licensing forum. Just request an additional 30 day from one of the admins. They will give it to you. You may have to give them your external IP (that's why you can't use another email).