In order to meet the requests about the GUI enrichment, i suggest using a simple slider with only 3 level (for ALL improvements), that will be better instead of adding new buttons everytime.
Based on information provided and memory used by the option, these will be placed under the 3 levels.
E.g.
Flag icons can be placed under Rich level , while region strings (ITA-ENG..) can be placed under Poor/Normal levels.
ProgressBar will be Flat/Simple (uTorrent style)/Mule style respectively under Poor/Normal/Rich levels.
And so on.
Default level, obviously, Normal.
So User button is used to show more or less features (to split users experience between Low/Medium/High)
The Graphics slider is used to show more or less "details" about showed features (to split hardware rendering capacity beetwen Poor/Medium/Rich ).
(Naturally, Simple ProgressBar/GUI Mode option will be replaced by this one).
(You can use a slider also for User, because until there are only 3/4 items slider feels good! ComboBox is for many items.)
(Note window title .... NeoLoader - Settings)
Based on information provided and memory used by the option, these will be placed under the 3 levels.
E.g.
Flag icons can be placed under Rich level , while region strings (ITA-ENG..) can be placed under Poor/Normal levels.
ProgressBar will be Flat/Simple (uTorrent style)/Mule style respectively under Poor/Normal/Rich levels.
And so on.
Default level, obviously, Normal.
So User button is used to show more or less features (to split users experience between Low/Medium/High)
The Graphics slider is used to show more or less "details" about showed features (to split hardware rendering capacity beetwen Poor/Medium/Rich ).

(Naturally, Simple ProgressBar/GUI Mode option will be replaced by this one).
(You can use a slider also for User, because until there are only 3/4 items slider feels good! ComboBox is for many items.)
(Note window title .... NeoLoader - Settings)