El Capitan & Hercules RMX dj console

Hi

I recently installed El Capitan but I'm having issues with my dj console.

The console runs via USB and Ive previously plugged it into a USB hub. Since using El Capitan I haven't been able to use my console at all. I purchased a powered USB 3 hub but that makes no difference. The console just flashes on and off to suggest there's no contact.
I used djay and virtual dj, but neither works.

Does anyone have any recommendations of how to get this to work, I notice other reported issues with the USB.

I'm about to do the drastic task of reverting back to Yosemite.

I'm also having problems with Mail, I can't seem to get any mail unless I use webmail 😟

I'm not impressed with El Capitan, and after initially reading the problems I decided to hold off, I think I should have held off a lot longer.

I'm using a MacBook Pro, 2.3 GHz Intel Core i7 with 16Gb RAM

Thanks for your input