If you regret the upgrade, you can always uninstall the new version and sideload the old 0.9.8 APK again.
This version focused heavily on stability and hardware-specific fixes during its initial launch: Device-Specific Fixes ppsspp old version 0.9 8 apk
At the time of its release, version 0.9.8 introduced several critical improvements that made it a "stable" favorite: If you regret the upgrade, you can always