v2.0.0-alpha

Pre-release of major version using a new GUI library

This release switches the earlier GUI library of PySimpleGUI with the more standard and versatile PySide6. This release is compiled from branch gui-swap and is not yet merged with the main branch.

NOTE: Although all user interface have been revamped, not all logic has yet been transferred to those yet.
Notable omissions that are underway:

• New (i.e. unknown) taxon processing
• Record navigation
• Taxon number lookup
• Data entry modes