Sorry guys, but where can I obtain the latest (beta 19) version of PSPUAE V0.80?

My main issues with the PSP version of this was speed....I know the PSP isn't a powerhouse, but it does seem to fall quite a bit short of the Wii version. The Android version too. Having said that, the V0.80 edition i am using was probably from 2010....so hopefully some major improvements?