Might not be a bad idea waiting for weekend and Ruuting pitching in his help.

The stump rotting stuff will take years. I applied this stuff on my Birch about six or seven years ago and now it has mushrooms growing,,, and the stump is still there.

Try drilling some holes around it and fill with kerosene. Let it soak for a couple days and then add a bit more kerosene and burn.
Assuming it is far away enough from any structures.

That is a long time for a birch stump, I am surprised it didn't rot by now, I have several apple and apricot stumps left from infected trees I cut down, they have lost their bark and started to break down where water was held, I kept putting manure all around a stump and watering it as it dried out but it do much so I am just waiting for them to do their own thing, I figure another 10-15 years before they are gone at this rate.

I usually do a chemical/physical combo. Cut everything down close to the ground, spray fresh cut with round up and let it soak, then take a grub axe to it and the ground around it.

OR I have also dug down wrapped chains around the roots and hooked the tow strap up to 4WD. That is the most fun way!

To kill it, cut it down and paint each cut stump right away with undiluted Roundup.  Wait until you can tell it is dead before you start digging it out to allow the chemical to travel to the roots and kill it completely.  If you get any new sprouts, cut them and treat the same way.

If you can get a back hoe in there that is the easiest way, we used to remove mulberry stumps with back hoes, it would take some time but it did work.

I'll cut it down to ground level. then either build compost on top of it, or put a fire ring and BBQ once a while.

For burning stumps out diesel fuel works great as well.

For a lot of tree and fig loving people we all seem to know a lot of ways to kill a tree.... just say'in

I agree with brackishfigger ,

Try to start treating it very special, whisper to it that she is your favorite, seems to work every time for me. If that fails warn the other members of the family to take care mowing and such around it. Works 100% for any plant not just figs.