PPSSPP on Ubuntu

[LemonTree]

> How do you choose "old" toolchain with Qt 4.8.2?
At the left side there are "Welcome,Edit,Design,Debug,Projects,Analyze,Help" icons in a column. Right ?
Choose "Projects" (with the PPSSPPQt.pro solution open).
Now in this new version of Qt Creator, toolchains are called "Kits", as far as I can understand. You can "add" new kits side by side, but in this case it's better to "switch" them directly. Now my Qt 5.0.1 kit is simply named "Desktop" and my Qt 4.8.2 kit is named something like: "Desktop-Qt 4.8.2 in PATH (System)": I can directly switch to it by placing the mouse in the dark squared box with the "Build" and "Run" buttons: a new arrow button appears and I can choose "Change Kit" from it.

However, if you need to "create" a new Kit manually, you probably need to tweak the setting from the main menu ("Tools/Options/Build & Run"); but I can't help you further since I didn't need to change these settings.