The new watermark xvm introduced when using nightly builds is slightly annoying both in garage and when first in battle here is a simple guide to remove it,
guide done by ragnorocek

I would like to share something with you. It’s a way to get rid of message in service channel and ingame watermark, which tell’s user that he is using nighlty (beta) version of XVM.
1. download pjorion ……………………………http://www.koreanrandom.com/forum/index.php?app=core&module=attach§ion=attach&attach_id=88383
2. copy script file consts.pyc from res_modsmodspackagesxvm_mainpython to some temp. directory
3. open consts.pyc in PJOrion (or decompile it and open in Notepad++)
4. at line 5 is defined xvm version e.g. XVM_VERSION = ‘6.4.0-dev’ remove -dev from string, so final stnig will be e.g.: XVM_VERSION = ‘6.4.0’
5. compile script (in PJOrion save as, choose .pyc and save)
6. copy newly created consts.pyc to res_modsmodspackagesxvm_mainpython and confirm rewrite
7. profit