I tried to add a Framed Sepia effect to a slide. Framed effects are unusable because framing is applied to the whole image not to the slide, so if the image is cropped the framing effect disappears. In this case, I have to crop 3:2 format pictures to fit in a 16:9 show, so top and bottom framing is lost. When I tried to remove the effect the didn't disappear from the slide in the preview window. Instead, the whole filter section disappeared from the Effects tab in the right area of the UI. If I save, close and reopen the project I can see the effect had actually been removed, only the preview didn't update.
Apparently most of the issues in Creator concern updating of parts of the UI and they disappear closing ad opening again a project or the program itself.
I'm not sure what is happening with that 'remove effect' issue, as it does not appear to be reproducible on our end. Please reach out through our Contact Us form to discuss that issue with us further. The cropping problem is reproducible and we will get that addressed.
@joshua now it's not happening anymore, but I have a totally different problem. I wrote you through the Contact Us form