Packet Peeper will not start on Mac Yosimite ?

[Former user]

When starting, I get this message, and nothing else happens :(

Packet Peeper[47489:6525192] Initializing a table column with identifier of type 'ColumnIdentifier'. For applications linked on or after 10.7, NSTableColumns expect NSString identifiers. This app should move to using NSString identifiers for table columns.

[choll]

PacketPeeper is document based so this is as designed :-)