When running versions OpenCPN
4.0 and 4.1.427 on same computer, I have found that when changing use from v4.0 to v4.1.427 initially
1.First rename the existing opencpn
.ini to opencpn.ini.40 which saves that ini for use with v4.0 and also permits a new ini to be created for 4.1.427.
2. Then if v4.1.427 is running ok, rename that ini to opencpn.ini.41
3. Then copy the appropriate ini back to opencpn.ini before startup.
I am finding that this helps with direct bomb outs.
You will have to copy your opencpn.ini chart entries into opencpn.ini.41 to have all your charts
available in v4.1.427