Starting from version 4.45 from 07.05.2018 URE Pro follows Gravity Forms version 2.3+ data model change:
Quote from changes list for v. 4.45:
“Function GFFormsModel::get_lead_table_name() call was replaced with GFFormsModel::get_entry_table_name() to provide compatibility with Gravity Forms v. 2.3+”.
This update is not compatible with earlier versions of Gravity Forms.
Workaround: replace URE Pro back with version 4.44 and plan update to the latest version of Gravity Forms 2.3+.
