Summary:
Please download the current release of IDImposer – 2017.05.28, at this writing. Otherwise, if you update to InDesign CC 2017.1, InDesign will crash after running IDImposer. Even if you just show the IDImposer dialog and immediately hit Cancel.
That is, to avoid the bug, either use IDImposer11 2017.05.28 (or newer), or don’t install the InDesign CC 2017.1 Update.
Discussion:
The dot release of InDesign, CC 2017.1 (a.k.a. 12.1.0.56), has a UI bug that affects IDImposer and many other scripts. (InDesign CC 2017.0 and prior releases are fine). The behavior of the bug is that IDImposer runs to completion, but then InDesign 2017.1 crashes, and you have to restart InDesign in order to view the IDImposer output doc.
For a more detailed description of the problem, see: https://forums.adobe.com/thread/2308052. A bug report has been submitted to Adobe.
Please download the latest version of IDImposer, dated 2017.05.28 (or later), which works around this issue.
Stephen Carlsen, 28 May 2017