I run a computer repair shop here in Central Florida and we are also an affiliate with CleverBridge to push Malwarebytes to our customers on a regular basis, because it is an excellent product and we stand by it 100%.
The only thing that's a bugger are the non-stop notifications that pop up for those that use the free version. With previous editions of Malwarebytes it was never, ever this bad. I understand you want people to purchase your product, but please take my advice on this one — these "UPGRADE NOW" notifications just annoy people and make them want to uninstall it. This practice isn't anything new, especially with anti-malware software, I get that.
Even if you could just reduce the notifications to purchase the premium version to just once within the 14 days would be an improvement, not every single time they turn on their computer. We explain to every customer that after the 14 days they'll need to manually run scans periodically to ensure they're free from malware — and majority are ok with that — the pop-ups are what they can't deal with.
Just some friendly advice, and I hope you take it into serious consideration.