Custom Waypoint Symbols Folder location in Windows 11 \?

I just updated to a new desktop and everything seems fine except I can't figure out where to put my custom waypoint symbol BMPs.  I tried recreating the USERs folder structure for Win 10 but all I get in basecamp are generic blue dots.  I'm running BaseCamp 4.7.5 with a Montana 700i.  Anybody know where to put custom waypoint symbol files in Win 11?  Thanks!  -Tim