I really enjoy using Tiled in my free time, it is a very good piece of software.
I just installed the new version and I get this dialogue when I try to open it:
Any idea of what it is about?
I don’t remember if that is important, but I may have done the mistake of installing the new version without un-installing the old version.
Normally this is not necessary, but when upgrading from 0.18.1 or older to 0.18.2 or newer, it was necessary due to a change in the installer. I guess you were still on this old version. Sorry for the trouble!