Hi Keith,
The application loaded correctly a few mins ago for me with no issues, so, sorry I cannot throw any light on the subject I am afraid. Since I am still learning the application I am unsure as to whether I did something wrong or if there was an issue in the package since it is the latest "alpha" version that has your single line / Vixen "lookalike" sequencing options involved.
I will watch and see what eventuates as I progress in baby steps, trusting that the learning curve will rise with time :-)
Cheers,
Terry