Extensions don't work since 2019 After Effects update...

Hi everyone

I'm having this issue since I've updated my CC suite this morning to the 2019 version.

When I look for the extensions in the "WINDOWS> Extensions" dropdown menu in After Effects (Illustrator as well), I can see them listed, but nothing happens when I click on it.

Adittionaly, the extensions that I used to have docked in the 2018 version workspace are now completely blank.

I thought that was a common problem, but I've asked to some colleages and they have no issues with extensions in CC2019.

How can I solve this?

Thank you all!

PS: Some of the extensions that I have: Big Pack, Handy Seamless Transitions (now "Motion Bro"), Overlord and so.