I have ruled that due to this happening on my new tower and not my ROG laptop https://www.daz3d.com/forums/discussion/182631/vanishing-script-and-custom-categories#latest
This is only happening when I try adding scripts and the DS portion of my custom categories. Everything shows up in my content listings.
I have tried re importing my custom categories and re installing DS. Tested 2 external HD. This has me thinking that something has gone sideways with the directories or paths. I know one can remove all the files including program files, app data and registry. Would I need to remove them all to refresh my paths? Where are all those files located again (Win 10) it's been a while.