How to manage Add-Ins in Inventor?
Here is the tutorial...
If you want to manage Inventor Add-Ins, go to Tools tab -> Add-Ins and from the Add-In Manager window, click every item and change it's behavior.
You can choose if an item should load automatically or you can load them manually by checking the Loaded/Unloaded checkbox.
Also, there is a description section available and the location were the add-in .dll could be found.