Under the circumstances, the easiest way may be to drag Cameyo to the Command Prompt, add a space and Remove so that it might look like this: Cameyo.exe -Remove
This will start Cameyo over, as if you had never launched it. If it had happened with a package that you had built with Cameyo, you might not want to start completely over. In that case, you could delete AutoLaunchAlways from HKEY_CURRENT_USER\Software\VOS\[AppID].
For a single session, you could use -ForceMenu parameter, e.g. Cameyo.exe -ForceMenu. If you want to persistenly prevent the possibility of selecting Always open this program, you can run "%AppData%\VOS\Cameyo\PROG\%Program Files%\Cameyo\Packager.exe" "-SetProperties:AutoLaunchAlwaysAllowed=0" [Location]\appname.cameyo.exe
Additionally, you can drag a package to Cameyo.exe and it will open the package in Package Editor.