What is the conflicting issue on your site when using all Meta Box extension plugins? Also, if you have a Lifetime license, you can use only 2 plugins Meta Box and Meta Box AIO to use all features of Meta Box.
Following the documentation https://docs.metabox.io/extensions/meta-box-aio/
I don't see any issues with the WYSIWYG field on my demo site. Can you please export the field group to a JSON file and share it here? I will import the field group to my site and check this. Please follow the documentation https://docs.metabox.io/extensions/meta-box-builder/#export--import
Also, you can try to deactivate all plugins except CusRev, WooCommerce and switch to a WordPress theme to see if it helps.
Regarding older versions, currently, we only support downloading the latest version of all premium plugins. If you want to use a specific version of a plugin, please let me know. I will share with you the file of that version.