DNS list is incomplete

Trying to create a new connection to DB2 but the DNS I'm looking for does not appear in the Data Source Name list in the New Connection dialog. In fact, the list seems to be truncated. Any DNS beginning with a letter after T is missing even though the complete list is there in my Windows ODBC Data Sources admin tool. This is Toad Data Point 5.7 Pro. Does anyone have thoughts about what could cause this?