I can't even guys...
My workflow involves switching from designer to photo to rasterize and use the mesh and liquefy tools (which by the way would be extremely useful to have a vector proportion tool in designer.) And often I need to crop specific areas of a layer to merge with other specific layers. Flattening the layers simply is not what I need here. I can't believe there's no other option for this? Please serif, I've done what you've asked and purchased the full package. I expected to unlock features missing in designer... So far I still have to switch to other software to find in my opinion, basic functionality. Very disappointed :((