I am glad to hear that you found the answer to your question.
Indeed, the only difference between the Trial and the Dev versions is the Trial popup message that appears randomly. You should not experience issues when switching from Trial to Dev version. If you update from one product version to another (for example, from Q2 2010 SP1 to Q2 2010 SP2), however, you may experience differences in the behavior of RadControls. We publish a list of Release Notes
with each new version that comes out. You can find the Q2 2010 SP2 release notes here
I hope this helps.
the Telerik team
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