After just completing the upgrade to 4.5.5 on my Mac the main home page just shows an image of a cafe street with a shaded box that should have all the options, but it's blank and I cannot clock on anything. It wont let me past this screen or allow any options even in the task bar. Please help! Thank you!

Computers & Internet - Rosetta Stone - V4 TOTALe: French Level 1-5 Set for PC, Mac