OFS3.61 for Citect 2018 installation

Dear community !

I'm currently installing Citect 2018 on Magelis RackPC (Windows7 SP1 x64) and facing issues with OFS activation. After complete the installation OFS is either claims, it's not activated or silently closes immediately after open (have reinstalled several times). Clearly i've lost my experience on clear PC Citect installation. But i remember it should work under Citect License. Register information is provided according to Q2651.

Please advise, what i'm doing wrong.

BR
pf