Can a movie in Pinnacle Studio 20 be exported to some type of micro-chip?

I have files with the extension .stu which I think are used by Pinnacle Studio Version 20.  But, Studio 20 doesn't recognize these files.  So, I am confused.  What are these files good for?

I have forgotten how to place a caption directly onto a video clip.  I can create a title and then move it to a track above the timeline directly over the clip where I want the caption.  I think there is a more direct way.  But, I can't find how to do it.

Does anyone know how I can remove a flaw in a video clip caused by a smudge on the camcorder lens using Studio 20? 

I don' think this works.  The line at the top of the corrected clip is green, not pink.  And when I right click on it, two options come up: Edit and Revert to Original.  There is no option to copy.

Thanks jjn.  I'm sure you realize by now that you're dealing with a novice.  I'm not sure what you mean by ''posting in the PS15 forum'' nor where you've moved the thread to.  Also, once I've corrected the audio of a clip, I don't know how to copy that effect and paste it to the other clips.  Can you elaborate? 

OK.  That works.  Can you apply it to the whole video at once or do you have to do it one clip at a time?

I have a video taken while traveling inside a car.  So the audio track has the sound of the car engine.  Using Studio 20, is there a way to preserve the audio track but somehow remove or diminish the sound of the engine?

Yes, your demo was a big help, jjn.  Thank you very much.

I'm not familiar with multi-point trimming.