Download of PsiWin 2.3.3 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available.
This free PC software was developed to work on Windows XP, Windows Vista, Windows 7, Windows 8, Windows 10 or Windows 11 and is compatible with 32-bit systems. The following version: 2.3 is the most frequently downloaded one by the program users.
The program's installer files are commonly found as 1.exe or Psconsv.exe etc. This free software was originally created by Symbian Ltd. PsiWin lies within System Utilities, more precisely Device Assistants. We recommend checking the downloaded files with any free antivirus.
From the developer:
If you want to connect your Psion to your PC then you will need the appropriate software plus an RS232 serial cable. There are now a number of different applications which will allow you to do this, the most popular of which is EPOC Connect, which is badged by Psion as PsiWin.
You may want to check out more software, such as ThinkPad-Konfiguration, Schmap or Hercules DualPix Exchange Webcam, which might be similar to PsiWin.