Excavator failing
MPM is launching excavator with this command line:

```
C:\users\grant\desktop\testcopy\Bin\Excavator\excavator.exe [{"id":1,"method":"algorithm.add","params":["neoscrypt","13.228.127.224:4233","1FyaoHySEa4VY9f3TtPBvGiMsYQCuGtYGE:GRANTNEW,c=BTC"]},{"id":1,"method":"workers.add","params":["alg-0","0"]}]
```

Even when I run that manually from the command line, excavator outputs this:
```
[14:40:54][0x0000148c][info] Log started
[14:40:54][0x0000148c][info] core | Found CUDA device: GeForce GTX 1080
[14:40:54][0x0000148c][info] api | Listening on 127.0.0.1:3456
[14:40:54][0x0000148c][info] core | Initialized!
```
Then just exits.  %ERRORLEVEL% return code is -1.

Anyone else seeing that behavior?
