"Load Graphic" window (characters -> "edit frame" or "add frame") leaks A LOT of memory

Visionaire Studio v4.2
Steps to reproduce:
1. Create a character
2. Pick any of his animations
3a. Click "add frame" button
OR
3b. Select existing frame and press "edit frame"

Visionaire Studio will start to leak about 200mb every second and soon crashes. It stops leaking as soon as "Load Graphic" window is closed, but leaked memory is not recovered.

Also same (or very similar) leak happens when "Select Position" window is opened (can be opened using "Select object position" or "Select object center" buttons in scene object property tab)

I can confirm that on Mac OS X 10.10.4 with Visionaire Editor 4.2, freeware version (Build: 1182)
Just left the Animation window from an Item open over night and woke up to a "your system has no more memory" message