Whenever I start game dev tycoon, I always get the same error:
Uncaught TypeError: Cannot read property ‘releaseWeek’ of null
(file:///Users/[User]/Desktop/Game%20Dev%20Tycoon.app/Contents/Resources/app.nw/compressed/codeNw.js:209)
It tells me to restart an I do but it still doesn’t work. I am using v.1.3.13 for mac.
Please help 
Do you start a fresh install or a game to continue your last game?
It might be possible that the property is a value from a save game and that the save game is broken. That is an assumption.
If you want to continue a game, you can try to delete your save games. But you need to start a new game then.
You have to find the temp folder of the game in this case. You should make a backup of the temp folder and delete it after that.
But I do not know where this folder is on a mac.
In Windows 7 the temp folder is located at C:/Users/[UserName]/AppData/Local/Game Dev Tycoon
Thanks I love your game btw