I found there is a folder and a file containing our template details:
templates/ja_social_ii/local/css/themes/zr (complete folder)
templates/ja_social_ii/local/less/themes/zr/variables-custom.less
I have uploaded all 23 files to the new j4 installation.
Now one problem remains:
how do I activate our ‘zr’ in the Ja social II template?
Please advise,
Regards,
Patrick