Bluetooth completly gone after choosing bluetooth-dongle in "Bluetooth explorer"

I wanted to add Bluetooth Dongle to my Macbook, because I have several devices connected to build-in receiver and Wacom Pad is leggy. As it tuns out, it was not the best idea....

I started Bluetooth Explorer and switched device. Now after reboot and disconnecting the dongle the original bluetooth is not working. I can see this kind of messages:

Initializing Bluetooth...

Bluetooth Support Initialization complete.

updateChainPower error: -3903

2020-08-25 11:27:43 +0000 Apple80211Get(APPLE80211_IOC_BTCOEX_MODE) returned error -3903

updateChainPower error: -3903

I've tried reseting NVRAM, SMC, choosing the HCI Host Controller: "Texs instruments" from Bluetooth Explorer -> Tools -> HCI Controler Selector. Nothing helped.

Is there a way to restore original bluetooth settings, so that it uses original bluetooth device?