To restore your Outlook views to the default, you just need to start Outlook with a cleanviews switch. In Windows 7 and up, it is easiest to let search do the work for you. Just type in the command:

outlook.exe /cleanviews

There are quite a few other switches available for Outlook 2010 and Outlook 2013.

I have used the /safe switch many times in the past for older versions when I have trouble with Outlook crashing.