For things bought elsewhere, I don't think Renderosity can do many.

Concerning what is in our Rendo librairy, I realized there are things that the site doesn't recognize. For example "M4_PegLegZZ_Vol1" that I have in my Renderosity librairy since 2014. It's the mystery but it happens.

Out of Renderosity, since RDNA closed its doors, I started to make a board with name of products and who made them and where they are. When I want something, I just check the board. Saved me several times here but not only. Specially like several years back Rendo didn't add into our account the Christmas freebies. I'm glad they do that now.