Geogebra hang when changing to 3D Graphics

Geogebra version 6.414.0-offline (19 december 2017)

OS: Linux Lite v. 3.6

cat /proc/version
Linux version 4.4.0-105-generic (buildd@lgw01-amd64-060) (gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.5) ) #128-Ubuntu SMP Thu Dec 14 12:42:11 UTC 2017

Laptop name: Dell latitude D620

CPU: Intel(R) Core(TM)2 CPU T5500 @ 1.66GHz

RAM: 3 GB

Problem description / how to reproduce:

- Start Geogebra blank.

- Wait until ready

- Change perspective to "3D graphics"

Result: Geogebra stop to respond. Cannot close Geogebra in normal way (as it doesn't respond).

[edit]

I can use pkill GeoGebra to terminate process. I got a question wheter to save - don't know if that is Geogebra asking or pkill.

More info: After i try to cange to "3D graphics", Geogebra and the rest of the system behaves as if one process used all avaiable CPU - that is all programs that is currently open responds very slow, takes several seconds from I try to get a window to get focus until it actual does responds. That applies to any open application that is open in same time as GeoGebra is in this no-respond mode.

[edit 2]

Is GeoGebra supposed to spawn that many processes?

when Idle - started blank

[url=http://i.imgur.com/e84tOVC....;

When Geogebra hangs:

[url=http://i.imgur.com/EdUKF2O....;