Hi, Jankson!
It is a pitty that you made your start on MPX-models with a monday-made Extra. Normally MULTIPLEX-Products meet a higher level of quality.
So you have decided for a WINGSTBI 7 (WST 7) for your Extra and you run a Futaba RC. Usually it is easy to connect the receiver to the WST 7: There must be some kind of bus-signal from your receiver and the link-cable must be stuck to the bus-connector to the IN-connector on the WST 7. Pay a little attention: the minus lead of all plugs on the WST 7 must be at the top! I makes sense to stuck the powersupply to the WST 7, this could mean your ESC is stuck to it. Why so? There is only the little link-cable to the receiver and that might be too thin for powersupply on the long way.
If the WST 7 does not find the right link-version immediately you have to get the MPX-launcher (WST assitant) to work which is necessary for all the settings anyway.
By the wasy: is your WST 7 "classic" or Easy Control? I prefer the Easy Control firmware - it is easier to handle.
You miss a rescue mode on the WST 7? How do rescue modes work on other makes? Is a rescue mode anything an experienced pilot really needs? So far I haven't missed it anyway.
with regards
profimc