The easiest way: change the registry key from HKCU to HKLM (check which one by using regedit.exe, viewing HKCU\Software\TortoiseSVN and/or HKCU\Software\Tigris.org\Subversion)
http://svnbook.red-bean.com/en/1.7/svn.advanced.confarea.html explains further places for configurations. -- You received this message because you are subscribed to the Google Groups "TortoiseSVN-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/tortoisesvn-dev/e362de07-0b05-4cc5-80e2-6edc7d820dee%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.

