hi Abhijit Pillattil,
I think the selected file is document from modules.so ,try to export whole app package and try to import.
refer this to export
This one is an document package so you are not able to import from app package.You can use this microflow document by clicking your module
In the above image Production is the one of the Module i am using by clicking right button from the mouse,
After clicking import document from file you can use that .mpk file to import and start use it.
I hope this one helps you :)