ardour 5.12 wont start

I’ve downloaded 5.12 from downloads section, installed it and cpu governor(as recommended by installer) and cant get access to ardour anymore.
When I click on shortcut it pops session setup window, after hittin “open” window is no more and nothing else is in place. If I hit new session it offers to choose template and dies after. Safemode wont change the behaviour. Tryin to lunch from terminal ardour5 says is not installed(I purged 5.11)
Using ubuntu studio.
Any ideas?

What precise command are you using to try to launch from the terminal?

Ardour5
In response console offers me to type apt-get install ardour

The version from ardour.org is installed in /opt/Ardour-VERSION/bin (where VERSION is replaced by the actual version) which likely isn’t in your PATH. So to run it you either need to give the full path or add that location to your PATH variable (this is how the shell/terminal finds commands).