VCEM License question

[Gambit5150]

I am looking at purchasing an HP Virtual Connect Enterprise Manager Flexible Quantity license for 10-c7000 enclosures. This makes my life alot easier since there is only 1 license key that I need for all of my enclosures. However, I have a question about that. If I add another 5-c7000 enclosures down the road, is there a way of increasing the number of enclosures that my 1 license key covers? If I can expand on my original purchase of a flexible-quantity license, then I should never need anything other than a single license key, which I like the sound of.

Thanks,
Steve W