8.0.12 is an older version of 8.0, and we are currently working on testing our latest version with fixes. We should have that available sometime next week, and I will send you an installation file for that version for you to test. I have also made a version of your file with that updated version, and will share it with you at that time.
However, the way to make new Boundary Conditions is to go to the Boundary Conditions Library, click New, give the new BC a name, and then you should be able to change the temperature and film coefficient.
In the Boundary Conditions dialog box, click the New button and a small dialog box will appear where you can enter the name of the new BC. Click OK after entering the name
The Boundary Conditions library now contains the new BC and the Temperature and Field Coefficient values can be entered as desired.
Robin