The downloaded .oxt file is a zip archive. If you are
creating a new dictionary, copy the .aff and
.dic files from this archive in the spell
subfolder of the Oxygen XML Editor preferences folder.
The Oxygen XML Editor preferences folder is [APPLICATION-DATA-FOLDER]/com.oxygenxml>, where
[APPLICATION-DATA-FOLDER] is:
C:\Users\[LOGIN-USER-NAME]\AppData\Roaming on Windows Vista , Windows 7, and Windows
8
[USER-HOME-FOLDER]/Library/Preferences on OS X
[USER-HOME-FOLDER] on Linux
If you are updating an existing dictionary, copy the .aff and
.dic files into the folder
[OXYGEN_DIR]/dicts/spell.
Restart the application after copying the dictionary files.
Note: You can setup Oxygen XML Editor to use
dictionaries and term lists from a custom location configured in the
Dictionaries preferences page.