Update TYPO3 Powermail from 2.x to 5.x or a newer version

Update_Powermail.sql

# Just copy all tables from plural to singular naming

create table tx_powermail_domain_model_form LIKE tx_powermail_domain_model_forms;
insert tx_powermail_domain_model_form select * from tx_powermail_domain_model_forms;

create table tx_powermail_domain_model_page LIKE tx_powermail_domain_model_pages;
insert tx_powermail_domain_model_page select * from tx_powermail_domain_model_pages;

create table tx_powermail_domain_model_field LIKE tx_powermail_domain_model_fields;
insert tx_powermail_domain_model_field select * from tx_powermail_domain_model_fields;

create table tx_powermail_domain_model_mail LIKE tx_powermail_domain_model_mails;
insert tx_powermail_domain_model_mail select * from tx_powermail_domain_model_mails;

create table tx_powermail_domain_model_answer LIKE tx_powermail_domain_model_answers;
insert tx_powermail_domain_model_answer select * from tx_powermail_domain_model_answers;