After spending tens of thousands getting a Kaseya system working right, and tens more paying for 'maintenance' which ends up costing the same as the original purchase per month ($2600 per month for eternity in my small company), I decided to forgo maintenance after 2 years of almost no updates.
Much to my surprise, all my AV (KES) licenses expired after about 2 months. Suddenly I have no antivirus for hundreds of clients, even though I've purchased several hundred licenses that are waiting on the shelf to be implemented when the workstations run into their expiration date.
The solution from Kaseya? Pay all your back-maintenance, and sign up for a contract to pay for 2 more years, at the cost of over $65,000.
I can find antivirus for a LOT less, and I can sign up for another MSP software at that price.

No sense pouring in good money after bad.