This update is just memory optimizations.

• Added option to disable double buffering for the preview. It will save memory but you will see image tearing while tweaking the operators. Only really worth it when working at high export size.
• Eliminated another intermediate buffer by optimizing the Blur operator, which was the only one that used it.

So to recap.
If, for example, you work at 4096x4096, the program uses 256 or 512MB less than the previous version.