BusinessObjects Board

Error opening up .blx file from local projects

All the sudden I am getting terror when I click on the .blx file in my local folders.
I have updated many objects in the .blx and today was going to publish it but when I clicked on the .blx, it errored out.

The error reads:

Maybe a dumb question, but were you logged into the environment that the universe is linked to? You link has the word Dev in it, I assume that is your environment. Were you logged into that environment when you tried to open the universe?
Information Design Tool is a little finicky about you being logged into the environment that it has associated with a local universe file.

Yes. It is a dev environment.
So, I imported a new version from repository, and it opened up fine. It is just the one I had been working on for the last 2 days.
Also noticed that the file size is only 1kb. The one I imported from repository has bigger in size.
Not sure how to fix it.

Can anyone help with this?