XUPPORT  This is a developer message to all users who have problems with invisible file.

1. This is not a bug at all - This is a feature.

In Xupport-Settings-Finder there is a option called "Show hidden files and folders". If this option is activated the Finder will display "all" files (including hidden system files as .DS_Store).

2. This option can easily be reset. Open Xupport and go to Settings-Finder, deactivate the "Show hidden files and folders" option or click the "Defaults" button. THEN restart the Finder (or the Computer) to make the changes take effect.

If you anyway have problems to make them invisible again, please contact me at http://www.applicorn.com.  
(Version 3.4.2)

XUPPORT  1. Open the Terminal application (Utilities folder)

2. Paste the following command line and press enter:

defaults write com.apple.finder AppleShowAllFiles -bool No

3. Re-login or restart.  
(Version 3.3.3)