I gave myself a thaumonomicon cheat sheet so I could use the crystal core (I wanted to move a node into my thaumcraft room before doing any research). I got rid of the cheat sheet, and created a new thaumonomicon the normal way, however its kept all the research. I there a way of deleting it so I can actually do the research?
The data for the research is kept in your player.dat file. If you have access to it backup the file 1st then use NBT explorere to delete the research. It is in one of the subkeys.