Thanks a lot for your help!
I'll send you a private message with a link to download the current BETA version that you have to install in your moodle TEST environment.
There shouldn't be any problem but I prefer someone else to test it with me (already tested in 3 different sites and seems working as intended)
Delete the old gismo module and re-run the exporter (the exporter will search for the new book logs).
And if you find anything that can be improved/solved I'll try my best to do it (if it's feasible)