My first post here so hello!
I'm having a similar issue with my plasmatrim.
I noticed it had stopped running through the sequence automatically, so removed it from the back of my monitors and noticed that the third LED was only showing purple and red.
I removed the usb cable, waited, then plugged it back in and the sequencing seems to be working again, but the one LED is still 'stuck'.
My question is regarding the 'Global brightness slider' as I'd like try that out, but for the life of me I cannot locate it on the Sequence creator software v1.11. Am I doing something wrong, or being dumb here? All I can see are three sliders, RGB.
Ok, so now I moved the PlasmaTrim to underneath my monitors (so I could troubleshoot the colour issue), and after about 15 minutes it's working fine again. I wonder if it was a heat issue?
I'd still like to know how to adjust Global brightness though