Just updated CSSU to 6.5 and simultaneously CSSU Features Configuration to latest version. Right after installing went to Theme Customizer, switched off custom transitions, went to CSSU config and it started without error. All settings were there (blurless saturation, desktop scroll) and I activated vertical desktop scroll.
All went fine but after rebooting I didn't find a way to scroll desktop vertically. It still only scrolls horizontally. Do I miss something?