The problem is caused by a bug on the code (I don't detected it yet), than doesn't delete some records from wp_options in the database. To fix it, you must write this SQL request:
DELETE FROM wp_options WHERE option_name LIKE ('%tlc%');
I detect than sometimes the plugin create some aditionals records with duplicated information and the TWP get the updates from them. You can delete them with this another SQL request:
DELETE FROM wp_options WHERE option_name LIKE ('%twitter_data%');
I'm looking for the bug on the TLC_Transient class, and when I find it I'll publish the fix, or, perhaps, I'll add a function for delete this records once a day.
I'm sure these request will help to somebody.