Skype Room Systems v2 3.1.100.0 has been available as an automatic update since March 16th.
3.1.100.0 Release Notes are as follows:
Application updated to improve telemetry.
Published Mar 20, 2018
Version 1.0
Blog Post
The lasts update from Skype for Business Online Escalation Team on a open ticket:
They have identify some Issues that were reported on the last release SRS v3.1.100.0.
"SRS freezing after updating it to app version 3.1.100.0. The clock stops, they cannot press on anything. Only a reboot makes it work again, but only for some time and then it freezes again”
We have a code fix expected to be coming on this by early next week for another Release to correct the issue.
Since its a Critical Functionality Loss Severity it is getting highest priority from product group to have this issue fix"
**So if you are doing a recovery to restore SRS to older build to resolve the freezing problem; you need to turn Off - Windows Store updates and would recommended to set local Group Policy to delay Windows Feature updates for 365 days until 1709 is supported as otherwise it'll download, try to install and failed if check for Windows Updates.