I Updated and My Changes Are Gone

If you updated through the Marketplace, your changed files are still on the server. They're just not used any more.

The Marketplace installs each version of a module or skin in its own folder, and points the normal folder name to the new one. On your server, in modules/ (or skins/), you see something like:

jrAudio -> jrAudio-release-1.1.0
jrAudio-release-1.1.0
jrAudio-release-1.0.3

jrAudio is a link to the active version. Your changes are in the older folder, here jrAudio-release-1.0.3. Copy them from there.

If you uploaded the new version over the old one with FTP instead, the old files were replaced. Then only a backup has them.

The changes were made in the module's or skin's own files. Updates replace those. To make changes that survive updates:

• Change a clone of the skin, not the skin. See Cloning a Skin.
• Change a module's template from your skin. To change modules/jrAudio/templates/item_detail.tpl, put your version in your cloned skin as jrAudio_item_detail.tpl. The skin's copy is used instead of the module's. See Changing How a List Looks.
• Or use the Template Editor. Changes made there are saved in the database, and Compare shows what an update changed. See Using the Template Editor.