I am working on LaTeX export functionality. You can actually download new beta (1.61 beta 2) from http://www.datafilehost.com/download-6cea854a.html.
Note that this 515k .ZIP file contains bare Mathomir.exe file and an example file. No setup.
To generate LaTeX code, type-in your equation, select it (or touch it by mouse) and hit the F6 key. The code will be copied into windows clipboard and you can past it anywhere you want.
Note that this is in development and I am asking for bug reports. Thanks.