See
Config.xml and the Settings page for how the config file works
and
Moving the folders for where the config files are located
In the config.xml file, there should be 3 resolutions:
<!-- 16:9
<Resolution
Resolution="J_1920x1080"
Width="1920"
Height="1080"
ScaleWidth="1920"
ScaleHeight="1080"
FixedScale="true"
FullScreen="false"
ListScrollAmount="3"
TextScrollAmount="3" />
-->
<!-- 16:9 -->
<Resolution
Resolution="J_1366x768"
Width="1366"
Height="768"
ScaleWidth="1366"
ScaleHeight="768"
FixedScale="true"
FullScreen="false"
ListScrollAmount="3"
TextScrollAmount="3" />
-->
<!-- 4:3
<Resolution
Resolution="J_1024x768"
Width="1024"
Height="768"
ScaleWidth="1024"
ScaleHeight="768"
FixedScale="false"
FullScreen="false"
ListScrollAmount="3"
TextScrollAmount="3" />
-->
"<!-- -->" are used for comments,
the first "<!-- 16:9" means that the first section "J_1920x1080" is disabled,
the second "<!-- 16:9 -->" means the "J_1366x768" is active,
and the 3rd "<!-- 4:3" deactivates the "J_1024x768"
To activate one of the others, move the "-->" from the active to one of the others