Uwe Stöhr wrote:
The PDFViewWin.exe is there to be able to update PDFs that are open in Acrobat. Unfortunately there is a bug in Acroread 8.0.x that opened files could not be closed. We therefore built in a workaround. It seems that this workaraound doesn't work with Adobe Reader 8.1. I'll check this.
You can remove all workarounds, the bugs are fixed in Adobe Reader 8.1. The tools from the official installer work fine with 8.1.
Joost