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  • When running Fledermaus for the first time right click the Fledermaus icon and choose 'Run as Administrator'.
  • If you are looking for our free viewer please see our iView4D page.
  • If you are wondering if Fledermaus will run on your system please visit our Hardware Requirements and Platform Overview pages.

QPD Compatibility

Fledermaus 7.5 uses a new version of the QPD format that is incompatible with the previous releases of Fledermaus (7.4.5.b and older), Qimera (1.0.7 and older), and QINSy (older than 2015.11.28.1) software. Opening an older QPD file in Fledermaus 7.5 will upgrade it to the new version, making the QPD unusable in older versions of the noted QPS applications. If this will break your current workflow, and you can not upgrade the newer versions of Qimera and QINSy, we do not advise upgrading to Fledermaus 7.5 at this time.

The new version of the QPD format is compatible with the current and future versions of Qimera (1.1 and newer), Fledermaus (7.5.0 and newer), and QINSy (2015.11.28.1 and newer).





7.5.3 Windows 32-bit

download352 MB
7.5.3 Windows 64-bit download369 MB
7.5.3 Linux 64-bit download506 MB
7.5.3 Mac OS X download

465 MB

Supported Platformsview 
Release Notesview 

License Server

LMGRD 11.6 required for FM 7.xWindows 32download17 MB
LMGRD 11.6 required for FM 7.xWindows 64download 23 MB
LMGRD 11.6 required for FM 7.xLinux 32download1.2 MB
LMGRD 11.6 required for FM 7.xLinux 64download0.8 MB

Deprecation Schedule












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1 Comment

  1. Thanks! I missed that change.