Thank you very much for this tool. I really appriciate your effort.
I have encountered 2 bugs. I will try to discribe them.
1. When you double click on one picture from the right column and make it show only the clicked one, if you remove it, the picture column becomes blank and you can't access the other pictures that you have added in the object. Only way to fix it is to delete the object and make it again.
2. When I try to change the size of the picture from the column slider sometimes the tool crashes.
I would like to make a request too for a future update. I would appreciate it if you could make it to accept other languages too (like Greek). I think you will have to change your encoding to utf-8.