Hi Olivr12408,
Thanks for your message and sorry for my late reply.
Both Cubasis and Cubasis LE allows to restore in-app purchases.
To restore your Cubasis LE in-app purchase please follow these steps:
Pre-Requisite
Please make sure to log-in with the same iTunes & App Store account data, used for the Cubasis LE in-app purchase
1 - Install Cubasis LE and launch the app
2 - If required, tap “Start demo” to get rid of the demo pop-up
3 - Tap the shop button
4 - In the shop section, tap the “Restore Purchased” button
Please let me know, if this helps to solve the problem.
Best wishes,
Lars