Litchi app. It is no in my Google play purchase from 2017.

I originally purchased in the playstore in 2017 for my Dji P3pro.Only used it a short while. Now I would like to use it for a DJI Air 2S to fly way points. Tried to redownload but Google play wants to charge me again.
I purchased from this account but the history only goes back 2018.
Tried to find support for this from the website but don’t see any.

Read FAQ #10 in the link below:

When you say “this account”, what does that mean? You need to be logged into the Google Play Store using the same Google credentials that you used when you first purchased the app.

Check the status of your purchase using the account you used to purchase the app at : https://payments.google.com/