According to a 3/25/16 Sage knowledgebase entry:
Unable to select Other direct deposit interface in PR Options for 3rd party.
This appears as if it affects only Sage 100 2016.1 and Sage 100 2015 PU4. If you are using a third party solution for direct deposit you may want to hold off on installing the latest product update until Sage can issue a fix which is promised for the next update due in June 2016.
via: Sage KB