Very Special Thanks to @Kondorito for helping me with my crashing issue.
It seems that my Special Artwork Layer A1 was not directly causing the crash, but it was with the the settings.ini for each of the systems where Length was set as 0.
Adjusting this to anything > 0 seems to fix the crash.
[Special Art A]
Not sure why this was only crashing when 1.5.1 came into play, but here we are.
Soo if you are using my 8Bitdo Special Artwork Layers or my Retro Cafe Theme and your system is also crashing, adjust each of your length=0 settings to the above.