The japanese characters are garbled.

with the japanese file as follow,
```
日本語
```
I got a garbled result as


I am using 1.1.54.0 session-manager-plugin.exe and powershell.

Reproduce the garbled Japanese output with session-manager-plugin.exe 1.1.54.0 from PowerShell using the file shown in the report. Trace the session manager plugin's character-encoding path and compare the result with the expected 日本語 output; done means Japanese characters render correctly.

Written by the indexing model from the issue text.