after effect running slow after one hour of use but running fast again as soon as restarted?

[Jean Mathis]

Dave, I upgraded to CS5.5, the slowing down had disappeared indeed. We are back to normal.
As for making old plugs available to the CS5.5 version I just followed this simple
procedure:

1) duplicate the whole content from of AE CS5’s media core folder to the mediacore folder of AE CS5.5

(from hd/library/applicationsupport/Adobe/common/plug-ins/CS5/mediacore
to hd/library/applicationsupport/Adobe/common/plug-ins/CS5.5/mediacore)

2) Duplicate the missing plugs in AE CS5 effects folder to AE CS5 effects CS5.5 folder

3) Duplicate presets and scripts folder in the same manner

Thank you very much for all your helpful advices.
Jean