Hi. I'm glad you like the tool.
Regarding the issues you pointed out:
1. I'll look into it.
2. In the chargen.ini file, the parameter "export_individual_sheets" does this. This is just one of the settings I ended up never documenting. :(
3. I'll do somothing about this in the next version. I think the UI has so many elements already that I was pleased to replace the v0.4 buttons with the combos. But I also think you are right. If you just want to browse all the options, the comboboxes becomes annoying.
Thanks for the feedback.