We have added number (1,2,3) and padded number (001, 002, 003). We’ve also added height, width, and aspect.
This will be in the next build of Squash, due soon-ish!
Anything else missing from the app?
I hope the update is soon, as I really need the WIDTH option in Rename.
@handshaper good news, beta 2 is now available 
@dan @differentdan The update mechanism is not working for me; I have tried multiple times, and it keeps telling me I’m up to date. Is there somewhere I can download the update?