Thank you for your help. Deleting the data on OneDrive and resynching was successful.
Pls be aware that I was using the version you reference on all devices (2 Windows 10, 1 Android). The 2nd Windows installation continued to work, however after deleting the Enpass folders on OneDrive cloud I was only able to resync from Android. Thereafter the Windows installations were also both functional including the new one.