
installer program files
The installer, in it's current version will not let you install to Program Files, the 'de facto' standard location for installing x64 applications; instead it defaults to somewhere under the AppData\Roaming path.
I am an Administrator of my PC and cannot run the app as an administrator or give it the permissions to run as an Administrator.
Can you please fix the installer so that you can install it to the 'default application installation location'?
Thanks.

Multiple flow charts lead to preview overlap
on centos 6.8
##FlowChart2
```mermaid
##FlowChart2
```mermaid
```

Inside Math Expression Underscore rendered as Italic
Typing an inline math expression, i.e. $\frac{dx_2}{dx_1}=-\frac{p_1}{1-p_1}$
The part in between underscores is treated as italics.

Menu text not appear
In Ubuntu 16.04 mate, menu bar text disappear.
When mouse cursor move in menu item, text appear.
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