Good news!
Finally, i've solved the problem with windows builds.
I thought it was related with windows 10 since first reports came from this OS, and wasted some time to prepare wind10 environment, and there i figured out that the problem was absolutely not related with OS, just incompatibility of the original GUI HTML API with backend API. This issue had fixed, please report new issues here or in bbr slack: boolberry.slack.com or in github.
New build available:
MacOS and Linux builds are coming soon...
Zoidberg.Thank you CZ! Wallet works perfectly, and send times are fast as ever (under 1 second)! Your participation is very much appreciated!