The SWITCHtoolbox should be very easy to use.
The following quick guides explain the most important usage principles.
Create a new group.
Add members to your group (i.e. by invitation).
Add tools to your group.
Start using a tool by clicking the "Tools" latch at the right page border.
Use the "Tools" latch to get back, or to go to another tool.
Choose a public group from the list and click the join button.
Depending on the group policy you are either directly added to the group or you will have to wait for a confirmation by the group administrator.