those are temporary files used when you have something opened in Solidworks. If Solidworks crashes these files will remain. If Solidworks is closed and they are still in the folder you can delete them if you want. Do not try and delete them if solidworks is still open as Solidworks may be using them.
Please using SolidWorks Rx.
Follow this step :
- Start - All Program - SolidWorks 2013 - SolidWorks tools - Choose SolidWorks Rx
- Choose tab system maintenance
- Check list Clean th temporary file
- Browse your folder
- Klik OK
Make these folders first
Go to options and set up your Backup/Recovery folders to these folders
Then those files will not be in your working folder.
There is definitly a setting so they don't show (mine don't). I'm pretty sure it's a setting in Windows, not SW, but I don't know the details. A Google search for "hide temporary files" turns up quite a bit of info.