The plug-in DLL is called "NPacu32.dll". It searches for a license file called "NPacu32.alc" which must be located in the "plugins" directory.
If you are using the plug-in with Acu4GL, your Acu4GL license file must also reside in the "plugins" directory. For Acu4GL for ODBC, the license file is "NPacu32.dlc". For Acu4GL for Sybase, it's "NPacu32.ylc". For Acu4GL for Oracle, it's "NPacu32.olc".
If you are using the plug-in with AcuSQL, your AcuSQL license file must also be in the "plugins" directory. This file is called "NPacu32.2lc".