SennsLab: Why does my study not appear on the "launch study" list?

Only studies that are completely designed appear in the "studies in progress" list.  If your study is missing, most likely some parts of the study are still undefined. 

Click on "manage studies" in SennsLab and find your study in the list.  Click on your study.

Any tab that lists an "X" or "!" next to the tab title means that that part is not defined so still requires input before the study is complete.  If you hover your mouse over these tabs, a pop-up dialog box will indicate what is missing in that category.