By misstake deleted the whole application

Hi Guys,
I need your advise(s)….
I did a very stupid mistake. Instead to deploy the application I mistakenly press delete the application (because this to buttons are very near each other).
And then also confirmed…… So my whole application is gone. I worked on this one the last 3 Years!!!

I working local on a windows machine. What is the best approach reinstall my application. I have an backup from SC, but I did the last two weeks many changes without making a backup.
Is there a way to find local on Windows? or should I install the backup and do all my changes again?

Any advise will help.

Thanks