Hello, yes this is a regression we're sorry for the inconvenience

I imagine there is nothing in the porting guide ?   Cc @phosit

To remove the extra folder your need to create the wip from that last screenshot. E.g ctrl+a to select all and then right click to compress via the context menu  Then people will be able to install it.

Its in .var/app/com.play0ad.zeroad/.local/state/0ad/log, removing it then entering 0ad will create new log.  

@FrankI've played and checked, working for me, I think you click: Learn To Play > Tutorial Happened to me too. instead of; Single Player > New Campaign > Tutorial > Start Campaign > Introductory Campaign. Upon completing just do Single-player > Continue Campaign/Load Campaign. Since you've complete the tutorial, you can redo it but 2x speed in case you haven't known that feature top right.