@MounaLafi: I've uploaded a test version here:
https://github.com/SubtitleEdit/subt...EditBetaT4.zip (but... no support on this as I do not really want to look at alpha version problems!)
EDIT: You basically take the Tesseract.exe + dictionaries from beta 4. If you take the dictionaries from best (
https://github.com/tesseract-ocr/tessdata_best ) you must rename them to three letters as expected by SE.