How to force Cwicly to use relative path to images instead of full url?
Now creating a new website version on a different domain. https://new.domain.com When site will be ready, then domain will be switched to https://domain.com. How to fix all the paths in a quick way after the switching or how to set Cwicly to use relative paths only?
If you don’t use a dedicated migration tool for this, one option is to use a database find and replace tool, for example:
If you do use this method, it is a very good idea to create a backup and follow the instructions carefully. 
This is what I do not want to do. Use tools to replace something in DB. 
There are some plugins that do this although I can’t personally recommend any of them:
https://wordpress.org/plugins/search/relative+url/
One we did use on a few sites until recently is:
We stopped using this because of conflicts with this and some other plugins.
why not, i use it all the time when migrating domains. It’s fast and it always works for me.