Hi qbassa,
Cubasis LE 3 is planned to be released at the end of March 2020.
We plan to add a similar IAP Transfer option to Cubasis LE 3 for the regular in-app purchases.
We also plan to add a new Cubasis LE 3 Full Feature Set IAP, to update the app with all features of Cubasis LE 3.
Best,
Lars