As a new DM I want thank you for the amazing app. However I have a question on how to update on PC. This is the first I've downloaded this kind of AP any advice would be appreciated
Glad to hear that you are finding a use for it :)
You should be able to simple overwrite the older files. App data are all contained in your OS's App Data area and is usually separate from where the app files are located. To be sure, you can make a back up of the files.
On windows, you can follow this link on how to find your App Data folder: https://www.pcworld.com/article/2690709/windows/whats-in-the-hidden-windows-appd...