could you guys make a portable version?
There is at the moment no ready-made portable version distributed, but you can make one by placing a "tiled.ini" file alongside the executable. If this file is present, Tiled will use it to store its preferences (instead of using the registry) and will also store session and other user data along with the executable (instead of using the system user data location). At least, I hope that is enough to be portable. If running the installer once is a problem, you can download a development snapshot, which is available as a ZIP file. You need to be logged in to GitHub to see the download links (under "Artifacts") after clicking on a build.