Sorry guys, I looked more deeply and found there was a caching 
mechanism deep in the processing of bmp files.  The bmp file and its 
name are kept and if you re-use the name, PowerPro uses a memory 
copy of the bitmap.  
The reasoning was 
- make it faster to show bitmaps for menus
- avoid having multiple copies of bitmap when used in multiple 
places (eg for button background on skin)

Note that cached files can be shared between bars so it is not 
enough to delete the cache when the bar closes

The right way to fix this would be to create a file.watchfolder for 
each bmp file in the cache and update the file cache whenever it 
changes.  Then I have to go through each bar and update any bitmap 
references to the old cache.

This will take a while to get right  It might be simpler just to get 
rid of the caching, now that people have a lot more memory on their 
machines. 







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