I accessed their beta program, and was able to load Serato Sample in Studio One 3.3.4. Was able to load a sample in it and that worked too.
1. Make sure you have the latest graphics card updates.
2. Open Studio One > Options > General, and turn off "Enable High DPI Mode." If that option is off, place a check mark to turn it on.
3. Open the control panel for your graphics display and turn off Anti-aliasing. There may or may not be an option for that. Please check.