Rupasi Young / Profile

Hi all, How do you clear the cache?  Or are there any issues with the MT4 that would cause the platform to slow way down?  I have assumed it the cache needed clearing but there may be another issue?  Thanks

I have some custom indis on my metatrader 4.  The characters are not appearing correctly.  I have been told that the wingding that should be 158 is appearing as something else.  This is the case with another character as well.