This release contains a few UI fixes and experimental support for proxy.
"The GitBackup extension is updated on a best-effort basis and accepts community fixes, that are best done through GitHub. Please report any troubles via GitHub's Issue system.
Important notice: As you might be aware, we have just launched ThingWorx 8.5 and with it a new solution called Solution Central, which is a brand-new cloud-based service to help you package, store, deploy, and manage your ThingWorx applications.
This service is supported by PTC and it contains features that seem to be similar to the GitBackup extension, but they are not. They are different type of tools: Git is a source versioning tool, while Solution Central is an artifact repository. When deploying applications between ThingWorx instances you should use Solution Central, while if you want to version your entities during development you can use the GitBackup extension"