Letos stores it's whole configuration in a single file, which is a regular SQLite3 database. Below are locations of that file, depending on operating system.

There's also possibility of using portable configuration directory (that can be moved together with application files onto USB drive, etc). This case is described at the very end of this page.

%APPDATA%\letos.org\Letos\settings

For example:

C:\Users\my_user\AppData\Roaming\letos.org\Letos\settings

$HOME/.config/letos.org/Letos/settings

For example:

/home/my_user/.config/letos.org/Letos/settings

$HOME/Library/Preferences/letos.org/Letos/settings

For example:

/Users/my_user/Library/Preferences/letos.org/Letos/settings

If - during start of Letos - there is a directory called letos-cfg in the same directory where Letos executable is located, then Letos will use letos-cfg for storing configuration. It will create file at location:

letos-cfg/settings

Alternatively there is one more portable location - the letos-cfg directory in the directory from which you start the Letos:

./letos-cfg/settings

For historical reasons, there is one more portable directory name, that Letos will respect - sqlitestudio-cfg, as it was the old name of the application.

%APPDATA%\SalSoft\sqlitestudio\settings3

C:\Users\my_user\AppData\Roaming\SalSoft\sqlitestudio\settings3

$HOME/.config/SalSoft/SQLiteStudio/sqlitestudio3

/home/my_user/.config/SalSoft/SQLiteStudio/sqlitestudio3

$HOME/Library/Preferences/SalSoft/SQLiteStudio/settings3

/Users/my_user/Library/Preferences/SalSoft/SQLiteStudio/settings3

sqlitestudio-cfg/settings3

./sqlitestudio-cfg/settings3