How can I use GitKraken on a private network?

Just go to YOUR_USER_FOLDER\AppData\Roaming\ .gitkraken folder and open config file. Edit date to many years later. If it did not work, remove .gitkraken folder, run the app, login with fake email and password, and edit config file again. Have fun.

You need to take (for Windows): ...\user\AppData\Roaming\.gitkraken and ...\user\AppData\Roaming\GitKraken from machine with internet access and place it to machine with a private network.