If you wish to be nearly but not exactly like new, you could create a new profile and put your changes in a macro. Each time I set up a new version of KM, I run the following macro just once. It sets a lot of things so I don't have to spend a bunch of time in EDIT - PREFERENCES.
Note. Don't run my version. You would get a KM that looks like mine. You have find the prefs that are different from the default in your system and put them into a macro.
KM_Setup_Prefs.kmm
### KM_Setup_Prefs.kmm
### Run once on new install to set some prefs
###
###
###
_KM_Setup_Prefs_Run {
$_KM_Setup_PrefsTitle = prompt( "Enter the KM version", "Set KM title", "K-Meleon" );
setpref( STRING, "kmeleon.display.title", $_KM_Setup_PrefsTitle);
setpref( BOOL, "accessibility.typeaheadfind", false) ;
setpref( STRING, "browser.startup.homepage", "http://www.perigee.net/"
setpref( BOOL, "browser.tabs.autoHide", true);
setpref( INT, "font.minimum-size.x-western", 14);
setpref( STRING, "font.name.fantasy.x-western", "Blackadder ITC");
setpref( BOOL, "kmeleon.display.accelInMenus", false);
setpref( BOOL, "kmeleon.display.backgroundImageEnabled", true);
setpref( BOOL, "kmeleon.download.closeDownloadDialog", true);
setpref( BOOL, "kmeleon.favicons.cached", false);
setpref( BOOL, "kmeleon.favicons.show", false);
setpref( BOOL, "kmeleon.flashblock", true);
setpref( STRING, "kmeleon.general.skinsCurrent", "Klassic");
setpref( STRING, "kmeleon.general.searchEngine", "http://search.yahoo.com/bin/search?p="
setpref( STRING, "kmeleon.general.searchEngineName", "Yahoo! Search");
setpref( BOOL, "kmeleon.plugins.favorites.load", true);
setpref( STRING, "kmeleon.plugins.macros.hotlink0.url", "http://kmeleonbrowser.org/forum/"
## if a hotline is to open in a new tab then the following pref must also be set
#setpref("kmeleon.plugins.macros.hotlink1.new", true);
setpref( BOOL, "kmeleon.tabs.fixedBar", true);
setpref( BOOL, "kmeleon.tabs.useLoadingIcon", false);
setpref( BOOL, "kmeleon.tabs.useLoadingTitle", true);
setpref( BOOL, "kmeleon.plugins.bookmarks.load", false);
setpref( BOOL, "signon.rememberSignons", false);
}
_KM_Setup_Prefs_ModMenu {
setmenu("&Help",macro,"Set up Prefs",_KM_Setup_Prefs_Run,3) ;
}
$OnInit=$OnInit."_KM_Setup_Prefs_ModMenu;";
$macroModules=$macroModules."KM_Setup_Prefs;";