You need just single installation, two identical installations collide together. Keep just single in preferences plugin folder and remove it from installation folder...
Next to adding support for R25, and fixing bugs, I have also added some extra options to show a tool-tip when hovering over an item.
I have also added some background behind the items in the main dial to provide for some contrast.
All configurable with additional options.
However, I have mainly focused on developing for R20 as this is the version I am mainly using.
I know the color scheme in R21, and especially R25, are darker than R20. The default values I thus have provided might not match those newer versions. Feel free to set up your own background color and opacity, as well as the tool-tip background color, and text color, font size, ... etc.