MacOS El Capitan - Unable to use Rekord Buddy

I’ve read most of these threads regarding the MacOS El Capitan 10.11.6 not being able to use the newest Rekord Buddy update.

I have been a paying customer since Rekord Buddy first came out and now I can’t even use it?

I’ve seen this link posted to use for my system and it’s broken? -
https://rkb-updates.next.audio/2.0lts/Rekord%20Buddy.zip

I need help asap as I have gigs on the weekend and thought everything would be fine and yet here we are.

PS. I am unable to even update my Mac OS any further than El Capitan 10.11.6

If the link could work then at least I’d be able to download the correct version needed.
Help.