I am sure you have searched the forums and seen nobody has reported code 10 as an issue and your download is not different to anyone else's so we can assume the driver is stable, otherwise it would be a product wide issue.
However code 10 on searching states "corrupt driver" this can happen from time to time on a bad download or if some internal settings to the system files have been manipulated.
I would suggest following this route
1. Uninstall the software
2. Go to device manager and make sure that COM and LPT are now showing, if not please revert back to my original advise on fixing this
3. Reload software
4. Connect Mitras and follow last step by step advise.
As this is not a reported issue, if the above fails then I would suggest connecting the lamp to a friends PC or laptop to rule anything else out. But it sounds like due to the missing COM port the drivers settings may have been changed or corrupted.