You'll probably want to pass on any in-place upgrades of True Image Echo Server for the time being. There's a problem with the Snap driver not upgrading correctly and preventing the software from locking the volume for an image backup.
According to the readme file from build 8076, the upgrade issue was to have been resolved, but there seem to be some more issues that may need to be worked out. We've reported it to Acronis Tech Support.
Until another fix comes out, just uninstall the existing version, reboot, install the new version and restart again (!) If that seems like a lot, it's less painful than manually removing the previous version via Regedit and Windows Explorer. Acronis Support can provide the exact details if you need it.