Any such retail licensee whose license has been so affected may file his, her, or its petition in the court of quarter sessions of the proper county, setting forth the facts and specifying the time remaining during said license year and for which the full license fee and additional tax has been paid after the repeal of the act under which said retail license was granted, which petition shall be verified by affidavit. Reasonable notice of the presentation of such petition shall be given by mail to the State Treasurer, and personally to the county treasurer and to the treasurer of all municipalities to be affected by said order. After a full investigation of the matter if the court finds that such retail licensee had paid his license fee and additional tax in full for the whole license year, and that there was an unexpired portion of said license year at the time of the repeal of the act under authority of which said retail license was granted, it shall make an order upon the proper county treasurer directing him to pay from the county treasury, as a refund of the said retail license fee and additional tax theretofore paid, an amount sufficient to reimburse such retail licensee for the period of such license year remaining after the repeal of said act, and shall also, in such order, determine the proportion of such refund which has been paid into the treasuries of the several municipalities and the proportion of such amount which has been paid into the treasury of the Commonwealth, and shall make an order upon the respective municipality and upon the State Treasurer to return to the county treasury such amount: Provided, That the proportionate amount of the collection fees allowed by law thereon to the respective treasurers and all costs and expenses paid out of such retail license fee shall be first deducted.