APK signing, C3 runtime updates including new expression compiler.
I can chose C3 runtime for my Instant Games project now. It runs fine in preview.
But it is not possible to click Export? Then it says, not supported.
It's not yet supported, but we hope to add it back soon! There's more details on the current state of the C3 runtime here: construct.net/blogs/construct-official-blog-1/c3-runtime-alpha-now-available-950