Where does SideWise store it's Tab Data?

I did some digging and found this folder in AppData (Win7):

C:\Users\[USERNAME]\AppData\Local\Google\Chrome\User Data\Default\Extensions\biiammgklaefagjclmnlialkmaemifgo\2016.5.5.0_0

Even used PowerGREP to search for SideWise Export Data inside files:

https://www.powergrep.com

Which file actually stores the export data? Is it using JSON?