Hi @shlomip ,
Big thanks for your reply!
I thoroughly read R80.40 Jumbo Hotfix sk and, especially, this: "For an Existing Security Gateway running on Open Servers, a Blink image consisting of R80.40 GA image (Take 294) and R80.40 Jumbo Hotfix is available in the Download section below. For VSX and Standalone configurations, see sk168114."
Also I took a look at sk168114 and found this: "ON a VSX environment, refer to "Minimal Effort" section in R80.40 Installation and Upgrade Guide and follow the Clean install option."
So does it mean that CPUSE upgrade is impossible for R80.40?
Do I have only one option to follow Clean install option in "Minimal Effort" section? Will Clean install with CPUSE transfer all config to new version?