Pinwheel software

I downloaded the shaft selecter yesterday and have really enjoyed it so far. I do have a question/concern. Since downloading it my computer has been messing up every few minutes (Connection errors, not up loading pictures, error messages). It's unbareable! My question or questions is: Has anyone else had a problem with the download? If I uninstall this software (to make sure that is what is causing it) will I be able to get it back since I paid for it? Obviously it would be better to call Pinwheel...I did. A machine answered and said they would be out for a few days ? Any help is appreciated!