here we go.

Dump the smart content tab and CMS; that is just my opinion.

The smart content tab is not going to show 99% of your content. It only works with the very newest of content, or content that has microdata.

DAZ does not update installers, the worst thing you can do is let them install to where they want to. Older installers; and if it's free it's old, install to where the content folder was when they were made not to where the my library folder is now. So you could have content installed to 4 or 5 different places on your comp. But consolidating them should be as easy as cut and paste.

The folder DS4 uses is the recently renamed "my libary" folder. I'm sure it doesn't confuse anyone that the old studio content fodler, the one 98% of DAZ installers will be looking to install to, has been changed to my library.

Your content could be in programs x86/DAZ, or programs/DAZ, or my documents/daz3d/studio3/content. Thing to do is find the "content"  folder, cut it out, and paste it to the studio folder with the "my library" folder. You can leave it there, or cut everything out and move it to the my library folder.

DAZ does not update installers, so always besure it is installing to the right folder. Old content will never have microdata so will never be in your smart content tab.  I Have 150gigs of content, I have 6 items in the smart content tab.