Tangix Tester Pro problem

I'm trying to take the CSWA exam today on my day off and have been running into problems.  When I log in and choose the CSWA exam it gives me a menu to select the appropriate language.  At first it shows up with options, but if I try to scroll down it goes blank.  Screenshot one shows the menu I am looking at and screenshot two shows what it looks like after I try to scroll down.  The only way to get it to come back is to restart Tangix.  Every time I try to scroll down though it goes away.  I want to do the test in English, but I didn't know if there are seperate options for American English versus British English.  If not then this problem is easily worked around.

Thanks,

David Taylor.

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