Import file. Editing before FeatureWorks. ?

Hello!

Is it possible to do DirectEditing on imported and model before recognition (before FeatureWorks)?

I am trying to import .STP model into SolidWorks.

But  Import Diagnostic filed to fix all issues.

I deleted some surfaces, now imported model looks much easier, but is it possible to run FeatureWorksnow? or what we need to run it?

full scenario:
I open a model of Basler camera http://www.baslerweb.com/en/products/cameras/area-scan-cameras/ace/aca2500-14gc (Basler ace USB3 C-Mount v02.STP)
direct link on GoogleDrive https://drive.google.com/file/d/0B1UPt0nGo86wenB0TF9PczkwWDg/view?usp=sharing

I deleted surfaces I need not.

How to run FeatureWorks recognition now?

May be we need to export part out and import again?

SolidworksGeneral