There are regular releases of TiddlyWiki with bug fixes and improvements. It's a good idea to keep up to date by regularly upgrading to the latest version.
The process described here is for upgrading standalone TiddlyWiki files. There is a [[different procedure|Upgrading TiddlyWiki on Node.js]] for upgrading [[TiddlyWiki on Node.js]].
This will download a file called ''upgrade.html'' to your computer. This file is the upgrade of your old file. You may need to open the location where ''upgrade.html'' was downloaded, rename ''upgrade.html'' with the name of the old file you are upgrading, and replace the old file by moving the new file in its place.
It is possible for a customisation applied in a previous version to break when upgraded to the latest version. There are two techniques you can use to help track down issues:
You can see which shadow tiddlers have been overridden in the ''Filter'' tab of [[advanced search|$:/AdvancedSearch]]. Select "Overridden shadow tiddlers" from the dropdown.