Is it possible to convert a published file back to a captivate project?

Hello, I published my final finished work to my content server to a published folder and it runs. After I published, I did a last save to to my content server in my cptx folder. Unfortunately, that last save corrupt my file and I can't open my project file to make edits. I have a working version that doe not have the assets, animations, and finished configurations I tweaked. I don't want to have to redo all the final tweaks, but would rather use my latest version to make the additional modifications. I already checked my cache and unfortunately I cleared it. I checked with my server engineer to roll back to last save, and it wasn't the version I needed, still a bunch of missing final work. Is it possible to take the published file and convert it or open up as a project? So that I can save it properly and make my edits?

Your help is greatly appreciated!