Attempt to merge 2 small fresh projects leads to freeze of GSA SER


Hello Sven,
I have tried several times, to make all projects Inactive, GSA SER is Stopped, no Threads is recognized on the status bar. I have also reset the Submitted records, and projects just keeps Options and Verified (105 and 130) to make projects for merge smaller. No matter what, anytime I try it, GSA SER got frozen. At the moment of trying is running only GSA SEO Indexer,  CapMonster, GSA Proxy Scraper and DropBox application, that feeds GSA SER by fresh lists.
Beyond mentioned apps is yet ran. I have set in all GSA apps count of threads to 20, however neither like that it have no possitive impact.

Is there anything else I can do, not to make GSA SER freezing all the time? That leads me to kill it in Task Manager and start it again.

My HW config is following: Intel i3-7130U @2,70GHz, 12GB RAM DDR4, 1TB M2 NvMe, 500Gbps WAN
System resources are following: 12%CPU, 35%RAM, 0%HDD, 0%LAN. 
My OS is MS Windows 10 PRO 64-bit. The machine is completely dedicated just for purpose of link-building.
Thanks for Your answer.

Regards,
Michal