Desktop loop on 'Initializing Stoplight' at startup


I’m on linux and the Desktop app loop on ‘Initializing Stoplight’ at startup.

i try several install / reinstall of current version (v4.10.7) but still not work. I use it a lot in the past.
In developer tools, i see some pending request to external url. So I suppose it’s a proxy problem. But i can’t go to preferences to change it (because of this ‘Initializing Stoplight’ loop)

Do you know how to configure proxy manually (conf file ? parameters ?)

Thank you