I have used Tunnelblick on my MacBook pro for months without any problem in the past.
I recently switched computers and got new MacBook with High Sierra system. I migrated all my apps which worked fine, except for Tunnelblick. It just would not open. I would click on it and nothing happens, no warning - etc. I then uninstalled it, and tried re-installing the latest version. When i double click, i get asked if i am sure i want to open an application downloaded from the internet - i click yes - nothing happens. I have double checked my settings, its not being blocked by system extension.
I even downloaded the beta version - i just don't get anything. i click on the app, nothing happens.