At first, I'd like to say many thanks to guys who made such a great thing like EuroScope!
And here's the problem I've discovered: it seems that positions with '_' in their callprefixes (e.g. UNKL_R_APP) are not recognized by program. It's quite serious issue for VATRUS controllers due to local ATC peculiarities.
As example, position of Krasnoyarsk Krug (Radar) - UNKL_R_APP:
Krasnoyarsk Krug:Krasnoyarsk Krug:122.000:KR:R:UNKL_R:APP:UNKL_R:APP:0030:0049
If someone staffs this position on appropriate frequency, I see not 'KR' in my positon list, but '10' or something similar.