Yes, you can upgrade your existing vSpace Pro 11.x deployments to vSpace Pro 11.3 LTS (also known as vSpace Pro LTS).
Older versions of vSpace for Windows (4, 6, 7, 8, 10, 11.0, 11.1, and 11.2) and vSpace for Linux have reached end-of-life. These versions are no longer available for download from the NComputing website, and the registration for them is no longer supported.
If you have existing vSpace Pro 10.x, we recommend you to uninstall vSpace Pro 10.x first before installing vSpace Pro LTS.