I too am having lockups after scraping with this tool.
It lets me play 3 or 4 games then locks up , and it has also locked up on the system selection screen too ??
have tried with rpi 1 and rpi 2 with different psus and different sd cards ….. its definately the scaping.
i even copied the rom folders to a usb and did a fresh install then allowed ES to copy the roms back into the installation and it locks up again ?????
what is causing this ???????