Bootstrap for OJS 3 gone

[nef]

Hi
All of a sudden I haven’t access to the bootstrap themes under my Website Settings > Appearance. Have anyone experienced the same, or can you tell me how to solve the problem?
I can’t find any relevant plugins
Regards
Niels Erik

[kawahyu]

Maybe you can read here

OJS 3: Need help with theme customization

After testing child theme I can say that customizing less files is fairly easy. In addition they have big functionality. Not doing much I can now completely change look of the journal pages. Recommend to everyone One more question. How can I look at the changes I made in my child theme without restarting it. For now I see them only when changing to another theme and then go back to child.