Here's a list of what's new for LGS 8.20.
- LCD Emulator (accessed by holding CTRL+Shift while right-clicking on the System Tray Icon)
- Ability to Enable/Disable enhanced graphics
- Ability to Enable/Disable downloading of high resolution images
- Per profile/per mode backlighting (for G-series keyboards/gameboards)
- Various bug fixes.
Profiles Added:
- Batman: Arkham City
- Battlefield 3
- Dead Island
- Deus Ex: Human revolution
- Lord of the Rings: War in the North
- Rage
- Serious Sam 3: BFE
- The Elder Scrolls V: Skyrim
- Warhammer 40K: Space Marine
Some additional notes on this:
- The Enable/Disable enhanced graphics option now fully delinks LGS from your 3D accelerator library, and will require a PC restart upon selecting or disabling this option
- LGS now comes preinstalled with lower-resolution images to increase performance on some systems. LGS is able to connect to the internet to download high resolution images. If LGS does not automatically download a high res image after a product has been detected, you may have Automatic Updates disabled in another Logitech application (ie SetPoint or LWS). Enable automatic updates in, say, SetPoint, and the high res images should download.
Crashes and detection:
- LGS 8.20 has a new set of drivers with improved detection routines. If you are having detection issues, try making sure you are using USB 2.0 ports (some USB 3.0 ports have enumeration issues), and make sure your devices are plugged directly into your PC
- If you are having LCore.exe crashes, the problem might be an access level problem inherent in your system. Try disabling UAC
But you cant have everything 
Try manually launching the applets in C:\Program Files\Logitech Gaming Software\Applets , and it should remember from there.
2: If you're having profile issues, try reassociating the profile with the correct .exe. I haven't seen upgrade issues myself, but try manually reassociating the profile with the game's runtime.
