Editor: -writableRoot start parameter?

[Ceres]

I started the Atlas editor from SVN like this:

C:\Users\<username>\Documents\0AD\0ad_svn\trunk\binaries\system\pyrogenesis.exe -writableRoot -editor

I am not sure whether the -writableRoot start parameter is needed for Atlas (or works at all for Atlas) and could not find any hints about it

So my question is, whether Atlas stores or changes any files (besides saved maps) somewhere else than under the SVN root path?

I want to be sure that none of my a25 RC2 files (installed in parallel to SVN) are touched when I use the SVN Atlas editor to experiment with SVN files.

Thanks for sharing your experience.

[Stan`]

It shouldn't but just check file dates.