Kodi DSPlayer – DirectShow Player for Windows
Yes, I'm on 8.1 x64 too and no problem like that. The thing is, the problem doesn't seem related to the plugin, the subtitle appears to be downloaded correctly and saved (do you see that happening? I mean, if you check, is the subtitle present in the relevant directory?).
For troubleshooting and bug reporting please make sure you read this first.

Messages In This Thread
Lockup on STOP issue resolved! - by MKANET - 2015-04-11, 21:59
RE: Kodi DSPlayer – DirectShow Player for Windows - by ashlar - 2015-08-14, 15:42
RE: 4G aware patch - by MagikMark - 2015-09-08, 03:27
Alt-F4 no longer quits - by JeffA - 2015-10-31, 20:38