This release brings support for IDA Pro 7.1, improves the SigAnalyzer signature parser to understand more signatures, and fixes a couple of bugs.
To install, either pick one of the installation packages and unzip them into your IDA Pro directory, or get the source and build the installation packages yourself.
If you just want to use the CASC functionality without SigAnalyzer, you can pick the casc_1.1.0_universal.zip archive. The plugin will degrade gracefully to CASC-only mode if supporting libraries are missing.