Xbench 2.9 shows corrupt Greek characters


I just installed Xbench 2.9 and added an sdlxliff (English-Greek). However, all Greek characters appear corrupted (??? µet? ta ???st???e??a, se ???a 46 et??, ? ??µ???).

I changed my language and locale settings (Windows 10 pro) to Greece and Greek, but I still have the same problem.

Any ideas to solve this?
Thank you