Hi lemon,
I apologize for any trouble caused by any selectors that were updated. This was a long time coming and was absolutely necessary to standardize our code across the whole plugin. The only thing affected should be any custom CSS you added, as we updated plugin options to automatically convert everything. And, for your custom CSS, if you’d like to paste in what you have/had, I’d be glad to go through it and update it for you, to be fully compatible with the revised selectors.
Thanks! And please let me know if you have any further questions regarding the update to 2.x.x.