In lieu of a "tool", here are some basic instructions. Data for your my.tablo.com via the Chrome browser, the WebSQL is stored into a sqlite database. You need to find it. I don't do Windows.... but on a Linux host it's store at:
And then you're looking for a strange dir like "http_my.tablotv.com_0" under that, and within that dir, in my case is a sqlite database name "4"
So from: $HOME/.config/google-chrome/Default/databases/http_my.tablotv.com_0 you want to do:
select objectID,JSON from genre;
Of course, that's just genres for know media that Tablo knows about currently (thus the EPG and recorded shows). But still, it's a start.
With a bit more effort you can get the channel map similarly.