Arduino Pro Micro ATmega32U4 - Not connect to USB

Hi guys,
I was uploading some code to my Arduino (Clon) and it took a long time. I disconnect arduino and try it again, but it wont connect to PC anymore. No USB connection, but arduino looks ok. Red LED is on.
Did I broke it? Is there some way how to restore it?
Thanks a lot:)

Looks like it is a common issue.

I posted here: http://forum.arduino.cc/index.php?topic=274370.0

and here: http://forum.arduino.cc/index.php?topic=224416.0

and here: http://forum.arduino.cc/index.php?topic=273747.0

Kind of solution ("reset" during upload) is present. But I hope to find real solution for the issue.