First copy RealFlowNode.exe and RFGUI_x64.dll into installed folder.
Now run RealFlow.exe, go to "Tools" and choose license ...
open "standard_license.txt" with notepad, click on "new license"
and copy/paste all lines from your notepad into License window.
now its ok ...
For RealFlowNode.exe , run it from a dos window, type RealFlowNode -license
and add license ...(copy/paste from standard_license.txt).