[r5e]

I have just upgraded my board to 3.6.1. I had vbspell installed when it was 3.5.3. Curiously, it did not appear in my list of products, therefore could not be uninstalled.
I have a clean system, with all other products removed. I have carefully followed all the instructions and I get the identical problem that everyone here reports (gets to 99% then has the error "Duplicate entry 'vbspell_allow_all' for key 1").
Finding the old product, re-installing and then removing again does not sound like fun.
Can anyone give me a rough idea where I would start to manually remove the tables from the old sucker? I am guessing that there is simply a vbspell table somewhere in my SQL and I am thinking that if I can just find it, delete the whole thing, this will fix the problem. Am I on the right track? If so, could someone please get me started on how I would go about doing this?