Hey there
I almost exclusively use SourceTree with the uncommitted changes filter mode set to 'modified' (among other reasons, primary one is I am way too lazy to maintain .gitignore)
Anyways, selecting this mode is the very first thing that I do for each and every repository that I open under SourceTree; on top of that, as I recently found out my mac was very often running low on memory, I tend to close sourcetree projects easily, which makes all the more tedious to have to click that 'modified' box each time
So I guess you can see where I'm headed: is there a way to set up SourceTree so that it will use this 'modified' policy by default - IIRC this was the case on very early releases of the tool, which somehow remembered the setting across sessions.