I've read a few topics with people confused as to how you subscribe and look at some of the work from the workshop. This may not be as straightforward a tutorial as I think it is, but at the very least it will give you some way of being able to access projects from the workshop!

I apologize in advance for not leaving a tl;dr. I have to explain quite a bit and don't want to leave any confusion, if at all possible.

First, look at the workshop and find the work you'd like to view. Subscribe to it. Launch Fusion 2.5 and hover over Tools, then click on Steam Workshop Tool. For some of the workshop projects, you can double click what you subscribed to and it will attempt to launch the mfa file directly, such as I Wanna Be The Engine. Your computer will likely ask what program you would like to use in order to open these types of files. You should prompt your computer to use Fusion 2.5, which is located here:

C:\Program Files (x86)\Steam\steamapps\common\Clickteam Fusion 2.5

If you're trying to look at projects like kisguri's, which are in zip files, double click the project and you will open the zip folder containing all of the files. For example, if you subscribe to Fastloop Platform Tutorial, it will take you to local\ugc\fastloop_platform_tutorial. Click the ugc directory and extract the files. Click on the extracted folder fastloop_platform_tutorial, inside that is the project folder plattutorial, and then all of the project content is in here.

This is important: I'm going to make a distinction between these direct launch subscriptions and zip file subscriptions. If I subscribe to I Wanna Be The Engine and want to look at the project, I can use the Steam Workshop Tool directly from Fusion 2.5. If I subscribe to Fastloop Platform Tutorial, getting access to these files is a bit different. Open the zip file from the Steam Workshop Tool (because you don't want to look for this folder yourself, of course you can always bookmark the ugc folder too) and then exit Fusion 2.5. Look for the MFA File, or in this case, dxn-FastloopPlatform. Double click this and the project will open. For whatever reason, it won't work if you try to open a project like this from the Steam Workshop Tool.

Hope everyone finds this helpful! Have fun everyone. :)