As a SolidNetWork license customer, you can control how to load the
HVAC and Electronics Cooling add-in modules for Flow Simulation using two
methods.
The first method lets you specify the
default behavior for the add-ins when you load Flow Simulation. The option Automatically load Flow Simulation add-in modules if
available is in the tab. Clear this option if you do not have a need for the Flow Simulation
add-ins. The HVAC and Electronics Cooling add-in modules do not load when Flow
Simulation is added in with existing methods.
The second method lets you override
default behavior and include the HVAC and Electronics Cooling add-in modules when you
load Flow Simulation. Click the Down arrow 
on SOLIDWORKS Flow
Simulation (SOLIDWORKS® Add-ins
toolbar) or SOLIDWORKS Flow Simulation with one
or both of the add-modules to load.
Without these methods, the licenses for the add-in modules are consumed
whether or not you need them and may be denied to other users on your network.