BookingsPlus will select one venue as your 'default' venue. If you wish to change this, it's straightforward.
Just log-in using your existing details. Once logged in, click on the blue button in the top right hand side with your name & select Edit Account.
Click on the 'Default Venue' drop down box. This will list all the venues you have permission to view. Select the required school & input your password in the Current password field.
Once you click the changes will take place.