I must say the current release has been so frustrating to use and you can no longer find stuff where they used to be. I have been looking for days for the Chorus effect. It used to be easily found in the bottom panel. Can someone please tell me where it is now hidden?
I don't know why you find this frustrating when it's very simple.
Open the Object Effects window. It should show up in the bottom dock. Select the object. In the Object Effects window you have some standard effects and + and - buttons at the bottom. Click on + then look at the list and pop outs.