The auto update function in Citrix receiver may fail if you are using the following Receiver versions:
If trying to manually update the receiver you will see the following message:
Further information and a fix is available from the Citrix website - https://support.citrix.com/article/CTX234657
You can exit full screen mode by pressing SHIFT-F2
Right click the title bar and select 'Resize Session' and change the desktop size:
Go to https://store.stockportgrammar.co.uk and log in using your current password.
You will then be prompted to change your password: