In v2.11.0 when the SQL SELECT query contains the plus ('+') character, after results are shown, if the [Show] button is used then the plus character is translated into a space (like in URL encoding).
To test:
SELECT * FROM my_table WHERE my_column LIKE '%+%'
Test the above on a table which can be like
CREATE TABLE my_table (my_column VARCHAR(32));
INSERT INTO my_table (my_column) VALUES ('+1'), ('+2'), ('+3');
Logged In: YES
user_id=210714
Originator: NO
Fixed in subversion, thanks for reporting.