It wont even open

Im supposed to be able to use this for school, and cant all. Its downloaded, and everyone was given their codes and they use Canute theirs. I cant even open mine because all it does is display waiting beneath the app icon as if it were finishing a download. Theres nothing to download because it was already done. I dont want to delete the app and then risk having to pay for it to download it again. Thank you for causing me to not be able to finish my labs and such.

Tishgacham about iCircuit