Typically you would specify a data source for your import as a text file / csv, where you could re-use the settings, with a new text file / csv.

That makes sense, thanks. Is there a way to uncheck items without having to import then? By the time I create the file and import it, I think I would be able to manually uncheck it faster. I was just hoping to avoid having to manually do it, but still get it done quickly. 

VI is my only idea, short of a script.

Yes.  There is a way.  You will have to download an app that does this.  I will post the link here to download at your own risk.  Always make a backup before making any changes.  

Here is the link to the AUTOCLICKER

https://sourceforge.net/projects/orphamielautoclicker/

You will have to download and use this at your own risk.  It worked for a client of mine with over 17000 checks that they had marked cleared and wanted to unclear all in one shot.  

Thanks!