Hi Lynette,

Yes, if you previously used the 32-bit version, you can install the 64-bit version - this will replace the files with the new version and use the 64-bit runtime, making better use of your resources.

If it important that all the computers connecting to the server,, also have 64-bit operating system to be able to run the 64-bit application. The following diagram will help you to decide what the right version is for your environment: 

• Update installation: Should I download and install the 32-bit or 64-bit installation file?