The App-V Client comes with the Registry Value “FileSize” in the “AppFS” key that indicates to control the App-V client’s cache size. This is not the case.
Instead, there might be a difference between the FileSize Registry value on the one hand and the actual maximum value and the value shown in the App-V Client Management Console on the other hand.
To adjust the maximum cache size using centrally controlled methods you have to initialize/flush the App-V cache or to use Microsoft’s App-V Cache Resizer Resource Kit tool.