first of all thank you for your efforts in making such a great plugin!
And most of all, for keeping it free :)
On Firefox 19.0.2 on Windows
If I add a new slider, I can see the box "Photo from your computer or media library" but if I click it, nothing happens.
If I click on the "Add new banner" button, I get the wait running circle but nothing happens.
On Google Chrome 25.0.1364.152 m on Windows
If I add a new slider, I can click the box "Photo from your computer or media library". The "LenSlider Media Manager" window appears and I am able to load an image.
I can see the image uploaded in the banner box and it shows me the path
but I am not able to change
WIDTH × HEIGHT (PIXELS):
It shows 500x200px of defaults and are not correct for the uploaded images.
Also, I am not able to change the "tab" to switch to "Text only", YouTube video, Vimeo Video.
Here, if I select "Add new banner", a new banner is added.
I have just installed the plugin, so I'm just trying to add the very first banner.
If you need more information to debug the problem, please let me know :)