I downloaded PKHeX today and wanted to mess around with PKHaX as well, but no matter wich method i use to start PKHaX (batch file or through the settings) i always get the same error. If this does not belong here i'm sorry but i didn't know where else to report this.
Exception Details:
System.InvalidCastException: Unable to cast object of type 'PKHeX.Core.PersonalInfo5B2W2' to type 'PKHeX.Core.IPersonalAbility12H'.
at PKHeX.WinForms.Controls.PKMEditor.PreparePK5()
at PKHeX.WinFo