Decoda 1.07 is now available for download. Here's the change list:

• Added option to automatically load the last project on startup (under Tools/Settings/Editor)
• Fixed bug where calling lua_pcall with no error handler would cause problems with some implementations of Lua
• Fixed bug where local variables and up values with nil values that shadowed global variables were not properly displayed in the watch window
• Fixed issues when using split views in the editor
• Fixed issue where the debugger window was not brought to the foreground when a breakpoint or exception was hit
• Changed Find in Files dialog to start out with the text selected
• Added saving of Find in Files search text history
• Fixed crash bug when calling lua_load with two identical chunk names, one of which was preceded by a @ symbol
• Fixed bug where strings enclosed in single quotes were not properly syntax colored
• Fixed crash bug when adding new lines at the end of a file during a debugging session
• Fixed issue where implementations of Lua that redefined lua_Number would not display numbers properly in the Watch window
• Fixed issue where multiple scripts with the same file name (but in different directories) would not be displayed separately in the project during a debugging session

You can either use the auto-update function built into Decoda, or grab the latest installer from here. There's no need to uninstall the current version when updating.