Sorry we didn't see the email you sent to Tactrix support. What email address did you send it to? Or what was the date and your first name?
You definitely aren't ever prompted to connect the OpenPort during EcuFlash install. It shouldn't cause a problem if you do, but I generally do not have it connected. You are prompted to install both the 1.3 and 2.0 drivers but feel free to skip the 1.3 drivers if you don't have that device.
You also don't need Java for EcuFlash. You will for RomRaider, but EcuFlash doesn't use Java at all.
Are you logged in as a user with admin rights?