Thought I would throw in my 2 cents here. To summarize the issue, with the new licensing key scheme of AC, you can no longer even install it on a new machine without obtaining a client key. There's only a few reasons to implement the license key requirement and this is to control upgrades. Most likely they are concerned about piracy.
This raises a few concerns:
1) For people who upgrade to 9.1 and then discontinue their support plan a year later, would they have to resubscribe to get the install key? If so, the Amazing Charts licensing agreement needs to be updated to reflect that you're getting usage rights to the program and no longer own it.
2) Make sure you let people know that upgrades can only be done by notifying AC if planning to move to new hardware. Wouldn't want someone trying to upgrade an AC over the weekend and being unable to get a key til Monday morning.
Solutions to the Problem:
1) Move away from AC backup and focus on whole system backups especially if you're not on the support plan. That means disk imaging like Macrium, Acronis, etc.
2) Use virtualization. If something happens to your server, you can move Virtual machines between servers without needing identical hardware.
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