Registry Healer does not copy settings from previous major versions - from 3.x to 4.x.
It copies settings only from previous minor versions (i.e. from 3.1 to 3.2, from 4.0 to 4.1, 4.2, ...).
To transfer old exclusion lists user can do this:
1) export from RegEdit the key HKEY_CURRENT_USER\Software\KsL Software\RegHealer\<version number> to a .reg file;
2) open the file in notepad;
3) replace <version number> at all lines [HKEY_CURRENT_USER\Software\KsL Software\RegHealer\<version number>] with the new version number;
4) save the file and double click on it to import.
5) check the Advanced Settings in Registry Healer to see your old settings in new version.