Disabling and Enabling FeatureWorks
When you select a FeatureWorks command, the add-in loads dynamically
if you have it installed and are running SolidWorks Professional or SolidWorks
Premium.
To access FeatureWorks commands:
Open a part that contains imported features
and do one of the following:
Click Recognize
Features 
or Options
(Features toolbar).
Click Recognize
Features (Data
Migration tab of the CommandManager).
Click Insert,
FeatureWorks and then click Recognize Features or Options.
In the FeatureManager design tree, right-click
an imported feature, click FeatureWorks,
and click Recognize Features or
Options.
To set FeatureWorks to activate whenever you open SolidWorks:
Click Tools,
Add-Ins.
Select 
FeatureWorks under the Active Add-ins and Start
Up columns.
You can turn off the FeatureWorks software when it is not in use. The
tools remain available on menus and toolbars.
To turn off FeatureWorks:
Click Tools,
Add-Ins.
Clear FeatureWorks under the Active Add-ins and Start
Up columns.