How do I find out what version of TinyMCE I am running?

Open the page, on which you integrate the tinyMCE and press Control+Shift+J

and type following command.

tinyMCE

and the output of the above the command, will show both major version, minor version and release date as shown in figure.

go to Chrome Console type tinyMCE.majorVersion and tinyMCE.minorVersion take a look