From the log file:
"5:35:19 PM: PlugInManager: C:\Program Files (x86)\OpenCPN\plugins\s63_pi.dll
API Version detected: 111
PlugIn Version detected: 112"
I deleted the plugin using Windows 'Add or Remove Programs' (which displayed the installed program info 'OpenCPN S63_pi 1.14.1501'). Opened OCPN to check that S63 pi had gone - it had. Closed OCPN then re-installed plugin from file s63_pi-1.14.1501-win32 (1).exe.
again and the log shows the same information as before, ie for V1.12.
Not sure where to go from here.
OK on the S57 data. That makes sense.