You're using the popsloader that's bundled with m33 in the flash memory. Enable the popsloader plugin in the Recovery Menu, and the next time you open ff7, you'll get a list of pops-versions to choose from. Choose "3.72" instead of "Original from flash"
Note that if your ms0:/seplugins/popsloader/ folder has just one file in it, you're missing the old versions of popsloader, and the psp will freeze if you try to choose from older versions. You can find them on torrents.
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