This is pretty similar to this post which contains a good answer
Essentially you install it like any other software on Linux when not installing with a package manager. You just put it in whatever directory you install applications which is usually something like
~/opt on Ubuntu for user level apps or /opt for system wide.
This also wont make a .desktop launcher on it’s own but this does a decent job explaining how to do that:
Now you should have enough info to Google any remaining questions from here since the install process for the designerlauncher is pretty standard compared to other Linux applications