You mean to say you installed Workflow Builder on your laptop? See that Oracle Workflow has a Client Side (WF Builder), a backend Server side and middle application side.
Assuming you successfully installed the client side then you must have a group of programs called Oracle OUIHome and there one called Application Development. There you should be able to find Workflow builder.
Useful notes for WF Builder:
How To Download and Install the Latest Oracle Workflow Builder (Client Tool) and XML Gateway Message Designer for E-Business (Doc ID 261028.1)
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