I am working on that manual right now. The Steam keys are going out to backers, I have outsourced it to someone else who is graciously doing that painstaking job of sending each Steam key to each individual backer!
The manual will likely be an executable that loads a reference panel with a search facilty built-in so it should be easy to find the information you're looking for.
The most recent patch for Grimoire fixed quite a few big problems and added inventory accelerator buttons to quickly flip through game inventory. Unfortunately the fixes may have broken existing savegames. I apologize to people who lost their game data but I think that could be the last time that happens. Grimoire had a lot of last minute changes, always a bad idea, some of them introduced these bugs I had to fix.
It is looking pretty stable. I don't consider item data missing sometimes to be a major bug and will be fixing each one of these problems on a case-by-case basis. This will never break a savegame and in fact 99% of most fixes from now on will not impact savegames.