I've created a small Python script to analyse mutation histories in saved simulation files. What it does is building a phylogenetic tree from the mutation details (taking advantage of their being saved in plain text). There must be some useful things to do with this, but I only print the tree with the numbers of bots having a particular genome, or having it as an ancestor.
Limitations : it ignores bots that never mutated, may give nonsensical results if you've ever stripped mutation details or if you have more than one species mutating.
To use it, you need to have Python installed. If you know some Python, I hope you'll figure out what it does, otherwise, I'm also including a handy batch file on which you can drag and drop .sim files.