Had the same thing happening. 
For me the restore to default doesn't work. When i click for example the V46  it directly reboots. 
Was able to delete some mui stuff and Amibench started up again.
The installerNG did hang with ibrowse installation. 
I did install a new installer (from aminet) and tried Ibrowse installer. After a few clicks it says need kick3.0 rom. 
greetings from Holland.