To those of you leaving negative reviews due to suddenly not being able to save classes after installing the Stick Pick 1.10 update: if you delete the app, and then reinstall it, it will work fine.
This update was necessary due to Dropbox retiring a back-end service we depended on for sync. We had to move sync to another provider, and the databases don't integrate. So, that's the story.
I wanted the update to be as painless as possible, and I'm sorry you're frustrated, but sometimes, these things happen.
Two suggestions: first, send to yourself your students' previous scores if you want to save those. Second, save yourself some time and import your roster from a CSV file via Dropbox.
Sorry for the inconvenience; please let me know if this works for you.