In addition to the FCAS executables, you may also find that the rad.fcx and appmonitor.fcx online applications need to be replaced.
Other updates since the initial release of build 4113 also contained an additional files that should be updated on the server. There is the RAD development module - rad.fcx (Windows only) and the Application monitor - appmonitor.fcx
Check all FCAS updates in your FC Updates folder for these updated compiled RAD applications.
Make sure FCAS is not running.
Download this file(s) from the updates document and log in to your FirstClass server as the Admin and open the Clustered Services > FCAS config folder. Inside there you will find the Online Applications folder. Delete the files of the same name that and there and upload the ones you downloaded from the latest updates.
You can now restart FCAS and you are up-to-date.