If you installed the BCS using the installer, it should be running as a background service. Follow the steps below to verify.
Hold down the Windows/Start key and tap the R key.
Type services.msc and click OK.

Scroll down and locate Visualware Application Manager - NetQCheckHTML5Agent.exe.

Check that the service status shows Running. If it is not running, right-click on it and click Start.

Two utilities should be running for the BCS to work. The video below shows how to find them.
Open Launchpad and search for Activity Monitor.
In the search bar (top right), search for BCS and then NetQCheckHTML5Agent separately.
If both are found, the BCS is running correctly. If one or both are missing, continue to Step 2.
The video below shows how to launch the agent manually.