You may run into a situation where work that you did in myBalsamiq isn't showing up on other computers. This is due to the way myBalsamiq's autosave mechanism works.
myBalsamiq is constantly saving your changes to your browser's internal cache. When you click "Save" in the editor, your browser sends everything in the cache to myBalsamiq's servers. If you forget to hit save, and close the editor, your changes are still stored in your browser cache.
To get the changes you made (but didn't save) back into the editor, simply re-open the editor. As long as you are using the same computer/browser that you were working on before, your changes should show back up automagically. Simply hit the "Save" button to commit them to the server. Then they will be available no matter what computer you log in on.
If your changes don't automagically show up upon opening the editor, send us an email and we will see how we can help!