When you uninstall Washing Machine 2014 and had previously purchased Washing Machine from the Mac App Store, the version from the Mac App Store will be uninstalled.
You can reinstall the Mac App Store version by launching the Mac App Store application and clicking Purchases at the top of the window:
Please be sure to use the same Apple ID to login to the Mac App Store that was used when you purchased Washing Machine so you do not have to pay for it again. Once you click Purchases you will see a list of Apps you have purchased. You will see Washing Machine and have the option to Install.
When you click Install, Washing Machine will be reinstalled in your Applications folder.