Hi Martin, sorry I do not seem to have received your later messages, possibly they have been intercepted by the spam filtering service.

Is it possible that the date on your machine has been changed recently? If so then that can cause the 30-day trial versions to expire prematurely. Or maybe there is some other problem like your virus checker is interfering with things. At any rate I'm sorry but if the second trial that I sent to you is also expired I don't have any way set up to do a 3rd one, you would need to try installing the 30-day trial version on some other machine or if you want to test modeling things instead of exporting you could use the "no save" trial version for testing modeling workflow, it's available a little bit lower down on the downloads page.

- Michael