Drawboard PDF PRO is an in-app subscription that can be purchased from within the base Drawboard PDF app.
To find the PRO page within the app:
App Settings > Drawboard PDF PRO > Upgrade
You can obtain drawboard from the Microsoft Store here https://www.microsoft.com/en-au/p/drawboard-pdf-read-edit-annotate/9wzdncrfhwqt
The app is only allowing me to enter a payment method who's location does not currently match my own
This can be resolved by changing your device and account region settings. After doing so it should accept the correct location's payment method. Here's the guide for doing so: Drawboard PDF: Resolving Microsoft Store's currency/location/region settings
I can only use education/business emails to access my Windows device
Since Drawboard PDF PRO is a subscription, it can only be purchased with a 'personal' Microsoft account as subscriptions are not supported on the Microsoft Store for Business.
If you require enterprise solutions for your organisation, please reach out to us via https://www.drawboard.com/licensing/ to expedite your request.