The holder of any retail license granted under and by virtue of any of said repealed acts who has paid to the proper authorities all such licenses and additional taxes in full for and in advance of the then current license year as fixed by the rules of the court from which said license issued, and which current year had not expired at the date of the repeal of the act under authority of which his said license was granted, shall be reimbursed for a proportionate amount of the license fee and additional tax paid for the privilege of engaging in such business during said year.