There was a download of EQMOD PECPrep 2.03 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The software lies within System Utilities, more precisely Automation.
The most popular versions among the software users are 2.0 and 1.8. The program's installer file is generally known as PECPrep.exe. We recommend checking the downloaded files with any free antivirus. EQMOD PECPrep works fine with 32-bit versions of Windows XP/7/8/10/11. This free program is a product of EQMOD Project.
From the developer:
PECPrep is a free, open source application for the analysis of your mount's Periodic Error (PE) and autoguiding performance. It can import data from different capture sources. PECPrep is able to filter wind, seeing effects, linear and non linear drift to isolate the periodic signal associated with a mounts worm drive. It can also be used to generate a Periodic Error Correction (PEC) file for use by EQASCOM.
You may want to check out more software, such as EQMOD EQMODLX or PERecorder, which might be related to EQMOD PECPrep.