Bypass Disk Usage Analyser

[Himanshu Shekhar]

Whenever I want to open any file directly from search, or places, or and
disk after mounting, it directs to Disk Usage Analyser, which I want to be
Nautilus instead.
Is there any method to fix this?

-- 
Himanshu Shekhar
IIIT-Allahabad
IRM2015006