https://kb.blackbaud.com/knowledgebase/Article/40133

Before launching your solution in Blackbaud Hosting Services for the first time, you must install the Citrix Workspace on each workstation.

NOTE: IF YOU DO NOT HAVE ADMINISTRATIVE PRIVILEGES ON YOUR MACHINE, YOU MAY NEED TO CONTACT YOUR ORGANIZATION'S IT DEPARTMENT TO INSTALL THE CITRIX RECEIVER FOR YOU.
  1. Navigate to https://www.citrix.com/downloads/workspace-app/
  2. Download the appropriate version - Workspace app for Windows Current Release
  3. Once downloaded, if the Installer does not start automatically, run the file.
  4. Once installation is complete, click Close or Finish (depending on your Operating System).
  5. NOTE: If prompted to enter an email address and create an account, click Cancel. This feature would create a Citrix Receiver account, which is not required in Blackbaud Hosting Services.
  6. Navigate to renxt.blackbaud.com to log in and launch your hosted application.

 

If your application is launching in Adobe Acrobat Reader or Internet Explorer, the .ica file type is associated with a program other than the Citrix Connection Manager. Follow steps listed here

Windows 10

  1. In the browser being used (such as Chrome) press CTRL + J to open the Downloads for the browser.
  2. Under the Launch.ica file last downloaded, click Show in Folder
  3. When the folder opens, right-click on the Launch.ica file. Select Open with... 
  1. Click "Choose another app"
  2. Place a check in the "Always use this app to open .ica files" checkbox
  3. Click More apps
  4. Scroll to the bottom of the list and select "Look for another app on this PC"
  5. How to associate the .ica file type:
    The common file path to the Citrix Receiver application is C:\Program Files (x86)\Citrix\ICA Client\wfcrun32.exe
  6. Click on your C drive on the left side and then open the Program Files (x86) folder.
  7. Open the Citrix folder, and then open the ICA Client folder
  8. Double-click on the WFCRun32 application (be careful not to select the Wfica32 application)
  9. Click OK to confirm the association with the Citrix Connection Manager