BUG: The advanced search in the bank register has disappeared

Product AccountRight V 2023.6.0

I am in the Bank Register window manually posting entries and when I post a payment from a customer, there used to be an [Advance Search] button on the Customer drop down.

It seems to have disappeared in this version of the software.

Please put it back ASAP as it saves a huge amount ot time when looking for customer payments.

AlanT