A new beta version has been released. Changes in FS-UAE 2.3.99rc2 ("FS-UAE 2.4 RC 2"):

• (Launcher) Windows portable version didn't store relative paths.
• (Launcher) Properly locate A500 kickstart on first startup when it exists.

Please see the preliminary release notes for FS-UAE 2.4 for information about what’s new if you are upgrading from FS-UAE 2.2.x.