I made a little probability Game in the latest Beta Release r86.
The arcade didnt like that, and linked me to the latest stable release.
I installed the Stable Version, but i can't open my Game in it, it wants me to get the newer version.
I guess i launch it in dropbox for now :)
This is what the Arcade uploader said to my file:
"You are not using a new enough release of Construct 2. Please download the latest release, export your game in it and try uploading again."