PPSSPP includes a built-in cheat engine that uses .ini or .db cheat files (originally from CWCheat). Users load cheats via the , not external plugins.
The ultimate goal is a future where you can discover and activate these plugins directly from the PPSSPP interface, making this entire process as simple as a few clicks. For now, you are an early adopter. While the current process requires a bit of manual work, the unique enhancements these tools provide are more than worth the effort. Ppsspp Plugins