I suppose I was asking about both. I just finally started reading about GM2 the other day. I have project thats still early in development (relatively speaking). Definitely curious about running in GM2 but I imagine sticking with 1.4 is safer for the time being.@Lonewolff: I was talking about the current (Trial) version. I think that is what the OP was asking about.
Once GMS2 is launched, you would be able to import old projects just fine. Currently compatibility scripts work only when you import an old project, so once importing is possible, you would be able to use them as well. But not with the Trial version.
Here's a guide that should help you:GameMaker Studio 2 FAQ said:GameMaker Studio 2 will import GameMaker: Studio 1.4 projects just fine. For any obsolete functions we will generate a compatibility script automatically for you so we can hopefully get your project running straight away - this compatibility script can continue to be used or you can edit your project so the extra script is no longer needed.
Some older resources (e.g., backgrounds and especially the old way of using tiles) will require a bit of manual work to bring them into line with the new functionality.