There should only be one.
Maybe you have installed the goodies after applying a hotfix to 11.
If so just run the lates hotfix again.
Also select the accessories add-on in the add-on manager list and have a look at the ADD-ON INFO section to see where it is installed.
Check both that you have in the list.
This image shows it in 16 but 11 should be similar.
The object library you will need to load through the Library Manager.
I don't have 11 installed so i can't say exactly where it will be but look in the ADD-ONS folder in the 11 program folder of your hard drive.
Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11