Thanks, it still need work.
Opensubtitles supports the hash search, which means that, if available, it is possible to get the subtitle automagically for the file you are playing.
This is done by calculating a checksum of the video file and submitting it to opensubtitles.org; believe it or not, in gambas is not possible to calculate that checksum due to the missing of the unsigned datatypes.
The workaround i found is to include a python script right into xt7.
This, of course, will require the python interpreter (yet needed for youtube-dl) to be installed.
..Anyway, i think i'll made a new submenu to get the hash search results immediately and a new window to get the subtitles manually by query, similar to the one i posted yesterday.