The updates come over-the-air, you won't need a computer to download and install. All OTA rollouts are staggered, so it may take a while before the update you need arrives on your particular device. Don't fret though, it is on the way. If you'd like to manually check for the update, or just review Verizon's instructions, go to this PDF for the Droid 2 Global and this PDF for the Droid Pro.
If you'd like to know what fixes and enhancements these updates bring, aside from the Gingerbread platform, all the necessary details can be found in this PDF for the Droid 2 Global and this PDF for the Droid Pro.