There was a download of PstRotatorAz 4.5 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The most popular version of the software is 4.5. PstRotatorAz.exe is the most frequent filename for this program's installer. The software lies within System Utilities, more precisely Device Assistants. This software is a product of YO3DMU. We recommend checking the downloaded files with any free antivirus.
From the developer:
The PstRotatorAz program can control a Yagi and a bi-directional rotary dipole on the same rotator, with the dipole in line with the Yagi's boom (90° offset from Yagi heading). This mode is BD-90. A second bidirectional mode (BD-0) supports the SteppIR antennas.
With “BD-0” or "BD-90" checked the PstRotator program will start in one of these two bidirectional modes. Or press one of the BD buttons to enter in the bidirectional mode.
You may want to check out more software, such as SLT Reverse Directory, ThinkPad-Konfiguration or maxx PDFMAILER, which might be related to PstRotatorAz.