QueryError: Error executing 'SHOW PLUGINS' (no replies)

Hello,
I get the following error on My SQL Workbencj 6.3 installed on Win x64 :-
Traceback (most recent call last):
File "N:\Program Files\MySQL\MySQL Workbench 6.3 CE\modules\wb_admin_grt.py", line 257, in _dock_admin_tab
self.ctrl_be.init()
File "N:\Program Files\MySQL\MySQL Workbench 6.3 CE\modules\wb_admin_control.py", line 311, in init
self.connect_sql()
File "N:\Program Files\MySQL\MySQL Workbench 6.3 CE\modules\wb_admin_control.py", line 530, in connect_sql
self.query_server_info()
File "N:\Program Files\MySQL\MySQL Workbench 6.3 CE\modules\wb_admin_control.py", line 721, in query_server_info
result = self.exec_query('SHOW %s' % plugin_var)
File "N:\Program Files\MySQL\MySQL Workbench 6.3 CE\modules\wb_admin_control.py", line 624, in exec_query
raise e
QueryError: Error executing 'SHOW PLUGINS'
Table 'L:\Windows\TEMP\#sqlc78_7_3' is read only.
SQL Error: 1036

How do I change the path from L:\WINDOWS\TEMP\ to some other dir like L:\TEMP?