I recently received a CVB dongle (serial number 50018) with a LightMeter Magic Number that I added through the Management Console. But still, whenever I start a LightMeter tutorial I get a message box telling me that no LightMeter License was found?!?
What version of CVB are you using? LightMeter has no longer been available as a separate tool since after 
10.2. If you are in fact using 10.2 - what type of dongle did you receive? One of the Wibu CodeMeters (either a silver plastic stick or a red compact stick) or a Gemalto/SafeNet key? (I think these are purple at the moment)
I am using version 10.2. The dongle I received is a short purple plastic thingy which reads “Sentinel” on the back:
Ok. “Sentinel” is just the name of the product line (which evolved from “Rainbow Sentinel”). So this is the type of dongles shipped with 
prior to version 11.0 (a.k.a. 2011) and will still be shipped by default if you order a 10 license. And in that case the LightMeter Magic Number also makes sense because up until version 10.2 LightMeter was still sold separately.
In September 2011 a problem was discovered and fixed that concerns LightMeter Magic Numbers for serial numbers >= 50000. As this was at a stage where no more 10.2 updates were published this fix never made it into a proper setup, but it is easy enough to apply: Simply copy the DLL from this archive [Lightmeter.zip (176.7 KB)] into your %CVB% directory, then I would expect the tool to accept the Magic Number you received. If this is not the case, please contact Stemmer Imaging’s or your local distributor’s support.
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