[Ubuntu 16.04 PB5.61 (x64)] IDE chrashes too often

[DirkJes]

Hello

My machine: Intel i7, 12GB, AMD graphics card Radeon RX470 (new and fast)
My system: Linux Ubuntu 16.04.1 /w MATE 1.12.1, and PB5.61 (x64)

The IDE crashes often to nearly all the time I'm running a program.

I've tried "without debugging": same problem
I've tried "Thread-safe" in compiler options: same problem
I've tried "GTK2": same problem

and

If I try to run some of the 3D demos, in "windowed mode" the mouse cursor is extremly slow, so I can't use it.

Please help me or repair it.
I like PureBasic for many years and used it for many years on Windows - but it isn't usable at linux (at the moment)!

Thanks.

Dirk
(Sorry for my english)