BobbyT: The produced files are indeed stored in different folder than Zorro/History so you don't accidentally overwrite some important history files.

The line reversion and file splitting are slow but when this part is done the Zorro conversion part should be very fast. I've just tried with a fresh install of Zorro 1.59 and everything works fine for me. The question is - are you using the latest version of the conversion scripts? I know the thread is a mess and I'm sorry for that. I would edit the first post but it's probably too old to do so. You can find links to the latest version here: http://statsmage.com/zorro-on-steroids-ii-data-conversion/ in the "Implementation" section. It's these two:

https://gitlab.com/panaczech/ZorroToolbox/blob/master/converter/convert.py
https://gitlab.com/panaczech/ZorroToolbox/blob/master/converter/ConvertData.c

There's no need for the bash script anymore. I'll try to keep the files in the repository updated in the future as well.