UV Editor doesn't work @ Object Builder

[SkepticalSmileyFace 0]

I've been playing around with object builder for a while, and now, whenever I hit the little button that says "UV", nothing pops up anymore. It gives me a thin lightblue line on the right end side of the program if I hold the button, and it shows me this:  

if I hover over object builder in the taskbar. But no actual UV Editor.

 

I've attempted reinstalling Arma3Tools and checked filepaths. I need help getting the UV Editor working again.

 

Best regards

 

[UK_Apollo 475]

After clicking the UV button, right click on the UV Editor in the Windows taskbar and select maximise.

It's a weird bug that happens every now and again.