Morph+ is designed to be user-friendly, but because many presets are advanced, it’s best if you’re at an intermediate level or already comfortable with Blender basics like modifiers and materials, so you can adapt the results to different types of objects and scenes.

Yes, it can be used on parented objects, but the parent’s location/rotation/scale will affect the final result. If something looks off, try testing with the parent transform at neutral values (or temporarily unparenting) to confirm what’s influencing the effect.

Many presets rely on transparency in materials, and complex or layered geometry can require higher transparency light-path settings in Cycles. Increase Transparent Light Path bounces and re-render.

It's not uncommon for Blender to crash when undoing operations involving complex changes or interactions with external files. As a safer workflow, after applying the preset, click somewhere in the view-port or move the timeline a bit before undoing.