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1,518 bytes added, 27 April
Fix case of fgfsrc, otherwise it won't work on case-sensitive filesystems (which is the case of most filesystems on Linux and traditional Unices)
{{note|The <code>/sim/fg-home</code> property should be considered read-only, for similar reasons why <code>$FG_HOME</code> shouldn't be explicitly set by users.}}
{{note|FlightGear reads the <code>[[Fgfsrc|fgfsrc]]</code> config file from <code>$FG_HOME</code> if it exists (<tt>fgfsrc</tt> without any leading dot), in addition to <tt>.fgfsrc</tt> from <code>$HOME</code> (with a leading dot in this case).}}
== Content ==
=== Windows ===
==== FlightGear 3.0 and later ====
<code>%HOMEuserprofile%</code> is usually <code>C:%homedrive%\Users\''User name''</code>by default, and <Code>%homedrive%</code> is usually C:\.
==== Before FlightGear 3.0 ====
When you encounter problems, try deleting the files, but '''always''' keep the <code>fgfs.log</code> and <code>fgfs_0.log</code> log files to help in troubleshooting.
== Power Users ==
Note you can also override FG_HOME in the environment, to have totally distinct installs - this would be my recommend approach to running multiple versions in parallel.
(The installers will always replace the stable / dev version as other commenters pointed out, so you can't use those so easily, you need to copy files around - I'm nota Windows expert so I don't know if there something that could be changed or improved here)
If you start multiple instances (the same version or different) of FGFS using the same value of FG_HOME (whether that be the default or a custom one), we use a lock file to ensure only one (the first) has write access. The rest will go into read-only mode, and as you can maybe guess, treat FG_HOME as read-only.
Sharing of aircraft / scenery is entirely about which paths are configured, BTW. However, one final caveat is that having multiple instances both running TerraSync, using the same terrasync dir, would likely act a bit funny. It ought to actually work, but it might download some things twice, and it's not a tested or supported configuration for the moment.<ref>{{cite web
|url = https://forum.flightgear.org/viewtopic.php?p=304170#p304170
|title = <nowiki> Re: Is it possible to install multiple instanes of FG in Win </nowiki>
|author = <nowiki> zakalawe </nowiki>
|date = Jan 25th, 2017
|added = Jan 25th, 2017
|script_version = 0.40
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