I use captivate 7.
After completing a first capsule formation, when I want to do it again, the capsule opens where I stopped the first time or at the end if I had finished.
How to make the capsule to start over when I do it again?
How to give the choice to the learner to pick up where he left or the beginning?
I suppose 'capsule' means a published Captivate file?
This depends on how you deploy, what you are seeing is automatic bookmarking. If you deploy on a LMS, this is a functionality of the LMS. If you are deploying on a webserver, check the TOC-settings: if 'Self-Paced Learning' is checked, try to uncheck and publish again. This type of bookmarking is using a cookie.