Hello MuskaBecky and welcome to the RatRage forums
Hmmm… not sure why AR would not be letting you add new content?
The only thing that springs to mind would possibly be a Permissions issue if the Operating System thinks you are not allowed to write to AR’s folders but I don’t recall hearing of that as a problem before?
Are you able to take any screenshots of what happens when you try adding content to ARVitae?
While New Groups can be created within AR, for some reason Groups can not be Deleted from within AR They have to be Deleted manually and AR restarted.
To Delete a Tool Group, if you don’t know where to find AR’s Root Content folder on your system you can find it and it’s subfolders from within AR;
For a specific Tool Group, have the Tool who’s Preset Group you want to Delete selected.
In AR’s Menubar go to: Tools > Brows Content Folders > ‘Tool Presets Folder…’
You System’s navigation will then open that specific Tool’s folder for you.
Alternatively you can choose to start at the ‘Root Content Folder’ which will give access to all Tools, etc… regardless of which tool is currently selected in AR.
You can now close ArtRage.
Find the Folders/Groups etc… you wish to Delete and Delete them as you would any other Folder or File.
Restart AR and that Group and it’s contents will now be gone.
You can of course also manually Add Groups or individual presets or other items from AR6’s Content Folder to the appropriate corresponding folders in ARV in this way too using Copy & Paste.
Again if you don’t know where AR6’s Content folder is stored; Launch AR6 and use: Tools > Brows Content Folders to find it.
Hope this was helpful if you still have questions do keep asking till we get it working for you and you can get back to painting!