B4R Question B4R 1.5 Compiling error

Hello,
I upgraded to B4R 1.5 and Arduino IDE 1.6.12, but when I compile program I get this error, would you please suggest a solution. OS Windows 7 32bit

Thanks

B4R version: 1.50
Parsing code. (0.03s)
Compiling code. (0.04s)
Building project (0.02s)
Compiling & deploying Ino project (Arduino/Genuino Mega or Mega 2560 - COM44) Error
Loading configuration...
java.lang.NullPointerException
at processing.app.BaseNoGui.selectSerialPort(BaseNoGui.java:1088)
at processing.app.helpers.CommandlineParser.parseArgumentsPhase1(CommandlineParser.java:143)
at processing.app.Base.<init>(Base.java:273)
at processing.app.Base.guardedMain(Base.java:219)
at processing.app.Base.main(Base.java:132)