Added the ability to use algorithm without adaptation, which is especially useful for old neuroheadsets, before versions MM + and MM2. Use the "No-levelling formula" option if, after a couple of minutes after the start of the meditation, the data dropped significantly.

If the connection is lost after 15-30 seconds on a device with Bluetooth 5, try turning off Wi-Fi on the device, especially if it is some Xiaomi models. Thanks to Alex Lokk for help.