April 09, 2015, 12:25:35 pm
OK.
Sounds like a windows issue, either not opening or not opening on top of Lumion so you can see it. We've not has an issue like that before.
1. What version of Windows are you using?
2. What anti-virus software?
3. Also, please provide some details about the PC, especially CPU, amount of RAM, GPU make and model.