Hi Simon
You are right :) here is a traslation / quick guide:
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Problem:
Once the commercial release has been installed, and launched for the first time, a "Invalid or corrupted license data" message appears, and later the following screen appears:
How to solve:
This is a small bug, and occurs when a existing trial licence is still located on the user's folder.
Open the following folder:
C:\Documents and Settings\<user>
where <user> is your session's user. Under this folder locate the following file, which corresponds to the trial licence:
.pixinsight-license
and then delete it.
Once it is deleted, launch the commercial release, enter your id and activation code. Now everything should work properly.
When the commercial licence has been activated, don't forget to make a backup copy of the. pixinsight-license file. Copying this file in your personal folder on any computer that you own, PixInsight should be able to be installed without problems.
We are sorry for the error!