How to open Google keyboard's dictionary

I'm interested in opening Google Keyboard's version 5 dictionary so that I could add personal dictionary words fast. I have thousands of them... In the past, Google put the dictionary in user_dict.db, an SQLite database that can be opened easily. Now they put it in /data/data/com.google. Android. Inputmethod.latin/ in a file with ".dict" extension for US English.

Can somebody show me the way to open such database file?
Thanks so much...

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