See release notes.

Due to an issue in ClickOnce technology the manual check for update from the previous versions fails. If you have already run manual check and got an error, then you have two options:
* Uninstall iPi Mocap Studio, then download and run the fresh installer from our web site. You won't need to enter the license key again. Important: if you don't uninstall, you'll have 2 copies of iPi Mocap Studio after installing the new version.
* Wait 24 hours - you can use the program but don't check for update manually. An automatic update will be triggered when the program is started after this delay.