Even though you have found a solution to this, a similar error does pop up in later versions of the software which we have found relates to the user's profile (whether using roaming profiles or local).
The quick fix for this is the delete the user's profile completely from either the machine or server (depending on type of profile used). I personally believe this to be a problem with the software and that the actual software itself is poor.
PERSONAL OPINION ALERT!!
I would rather spend the extra few thousand pound and get an Adobe site-licensed package that has a wider user base than Serif and also has many more million pounds spent on it's development.
