To manually install the Blackbaud RE_Express instance of SQL Server Express, follow these steps:

1. While holding down the 'Window' Key, press the 'R' key
2. Browse to the downloaded Install folder for the Raiser's Edge, and then to \ISSetupPrerequisites\Blackbaud SQL Server Verification\.  (For example, the path might be C:\Users\[UserName]\Desktop\Install\ISSetupPrerequisites\Blackbaud SQL Server Verification\)
3. Select the file named Setup.exe and click Open.
4. Before running the command, enter a blank space, and then copy and paste the following commands to the end of the line: --BBPRODUCT=RE --FORCEDINSTANCE=RE_EXPRESS (for example, the finished command may look like "C:\Users\UserName\Desktop\Install\ISSetupPrerequisites\Blackbaud SQL Server Verification\setup.exe" --BBPRODUCT=RE --FORCEDINSTANCE=RE_EXPRESS)
5. Click OK and follow the prompts to install SQL Server Express.