Evar settings doesn't take affect during install

[Tobbe]

This only applies when installing while another instance of LiteStep is already running.

> Definite bug here. Because the evars were configured After the LOSI litestep was launched, none of their settings took affect. For example, I was just trying to figure out why notepad was being launched when I tried to open the $txteditor$, and looking at !alert “$txteditor$” showed that it was configured as “notepad”, yet that is not what “evars.rc” had defined. Quite confusing at first. [jugg]

This will have to be solved either by configuring the evars before launching LiteStep, or by calling !recycle after updating the evars.

[Tobbe]

Now, after solving [bug 3](https://github.com/Tobbe/losi/issues/3) this only happens when installing to a directory that already has a litestep.exe in it.

[the-golem]

If the directory already has a litestep.exe, chances are that there is already an evars.rc set.

I think that if you configure the installer to find an existing evars.rc, as per bug 13 then you'll solve this bug at the same time.