Traktor Pro 4 Update affecting Traktor Pro 3

Aitch

MacBook Pro (15-inch, Mid 2012) / Mojave /2.3 GHz Intel Core i7 / 8 GB 1600 MHz DDR3 / Traktor Pro 3.2.1.9 / S4 MKII Controller.

I tried to update to Traktor Pro 4. After downloading the test update, I found out that it wasn't compatible with my Mac's Mojave OS. So, I deleted the update and thought nothing more of it.

A couple of days later, I switched on my set-up whilst preparing for my radio show and noticed even though I had opened the program, my controller was fully illuminated (only the panels with Traktor & Kontrol S4, plus the lights indicating the channel input, were illuminated )

After a frustrating few days of attempting to follow various instructions online, I'm still no nearer to getting the programme to function.

Basically, there's no connectivity between my Mac and my controller.

I may have to uninstall and then reinstall the program, but if I do, I want to be able to reinstate my playlist history, which goes back to 2010.

I'd be grateful if anyone has any experience with the issues I'm facing and can offer me some insight as to how I can get my system back up and still have all of my playlists.

Regards

Aitch