I had the same issue that Annabelle was locked at 80% at the end of the update without any hints and managed to recreate the problem:I am not sure why you are not seeing hints, but it appears you need to help Annabelle workout, and take her to class again. If you used a mod, you might be broken.
As for the completion, you can check their profiles, and galleries, when they are at 100%, you are done for now.
You can trigger Annabelles newest Hentai Impact event at 00:00 and the fowolling photoshoot before taking her to class on friday. I accitendally did it the first time and after the 2nd photoshoot you won't be able to take her to class anymore -> missing 3rd class and workout events at the end