Aliexpress keep changing their website code to break the plugin.
I've just updated it. Should work now.
Also added the wishlist feature they broke from v1.*. It now includes an image similarity search. Config menu is back also.
They recently got rid of all classnames and ids on everything, so now it doesn't rely on them.
Theoretically it should be harder for them to break this version, and if they do, it should be easy to patch.

Re: @null000llun:
Aware of this problem. Very annoying. Works better if you sort by price in ali and dont use 'Best match' to begin with. Ive fixed it before but Ali keep changing their code.
Could use someone to collaborate with on the code in general :(