And more.
Sometimes, when it does remeber the textures (external png), it comes all screwed up.
It doesnt remember where the picture is placed on the part, etc.
And any other kind of mess that a program alone can do.
Make sure you are saving your decal images in the directory that pro/e opens up to, or have that location referenced in your config.pro or search.pro. I keep my appearance files in the same location as my pro files and template/format files.
This should prevent you from having to re-apply the decal.
Pro/E never stores paths to any reference files. Doesn't matter if it's pictures, parts or formats. You need to use config options to tell Pro/E where all this stuff is. Takes a little getting used to. Once you figure it out & get it set up you will find it is very flexible and powerful.