It's a largely abandoned project (hence the bugginess) and not one I'm looking to write a help file for right now. I'm happy to answer questions if you have them (e.g. yes, the Fill tool is totally broken and shouldn't be used), but that's about it.

I tried changing version to 1.24 and loading the Haunted House tileset; nothing crashed.

Animated tiles are at the very bottom of the tileset pane. Double click one to edit it, or double click the blank space at the end of the list to create a new one. Then Ctrl+Click to add frames, Del to remove frames, F or I to flip frames