No, here has to be a different point. If the OpenCPN
InstallPermit checks ok, then the system is the correct one and the Windows update did not make any harm.
Can you please send us your log file?
(Btw.: o-charts does not license
S-63 charts, only the S-63 UerPermit itself).
The version of the S-63 plug-in used?
You are sure that you are using the correct PERMIT.txt file?