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= How to reset preferences =

If you experience certain errors and strange behavior, it might be caused by inconsistencies in the program settings. In order to reset everything, you need to rename or delete the preferences directory. This way, JOSM will behave just like you have installed it the first time. Note that while the file {{{preferences.xml}}} contains most program settings, there are other files which could be causing problems, such as an image cache, bad plugin, etc.

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== Locate the settings folder ==

=== Windows ===

In Microsoft Windows the JOSM preferences directory is placed in your application data directory, which is typically {{{C:\Users\USERNAME\Application Data\JOSM}}} (Windows Vista and 7) or {{{C:\Documents and Settings\USERNAME\Application Data\JOSM}}}. To find the specific directory on your system, open an explorer window and type:
{{{
%APPDATA%
}}}
in the location bar and press {{{Enter}}}. You should find a folder called **{{{JOSM}}}**.[[BR]]
Alternatively, try to search for the term {{{JOSM}}} or browse the usual folders, that contain program settings.

=== Linux and Mac ===

The settings folder is in your home directory:
{{{
~/.josm
}}}

== Java preference folder option ==
Alternatively, it is possible to set the preference folder at start up on the console with:
{{{
-Djosm.home=
}}}
e.g.
{{{
java -Xmx1000m -Djosm.home=$HOME/.josm-latest -jar josm-latest.jar
}}}

This may be useful when testing different versions.

== Command line option
The [CommandLineOptions command line option] {{{--reset-preferences}}} resets the preferences to default.

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