I have upgraded by copy of SciTE:
Using a clean installation: when trying to toggle all folds I run into problems.
The effect of the menu command, a shortcut or a lua command is the same - the fold indicators change but the text is still displayed until something else trigger a redraw (e.g. looking at another tab).
Once something triggers a redraw the text folds and the next call to toggle all folds
After the unfolding another call to toggle all folds exhibits the same behavior.
I tested against .lua and .vbs files.
This does not happen with Version 4.4.5.
Kind Regards Gavin Holt