i tried to install the older driver - Radeon Software Crimson Edition 16.11.5, but my system down every time during installing the older driver, and not able to startup my computer until I used a restore point to restore my windows
radeon Additional Settings has been removed from the current driver set. This is from the latest driver for your GPU:
Radeon Software Crimson ReLive Edition 17.7.2 Highlights
New Features and Improvements
- Radeon Additional Settings has been retired and its previously supported controls for Switchable Graphics, Color Depth and Pixel Format have all been moved into Radeon Settings.
By the way, On my computer your PNG's don't work.