Blackbaud recommends that organizations use the latest version of Citrix Receiver, or any version currently supported by Citrix. Older versions of Citrix Receiver may function correctly, but the latest versions offer the best performance and reliability. 

The download for the latest supported version of Citrix Receiver is available from the Blackbaud Hosting Services website. Citrix Receiver can be installed or upgraded by following the steps in this Knowledgebase Article: How to download and install the Citrix Receiver

To identify the current version of Citrix Receiver installed on all workstations, please review the steps noted in What version of Citrix Receiver do I have installed?