Thank you for your replies; I think I will stick with vers. 1.5.0 for now. I will be measuring my next 1600 patch target this afternoon, and will try dual scan mode.
For my question labeled 2, I found on the X rite site in the Support, under i1 Photo Pro, under topic labeled "Troubleshooting and Diagnostics", then choose
topic "Software freezes or crashes during initial patch measurements", at URL address:http://xritephoto.com/ph_product_overview.aspx?ID=1913&Action=Support&SupportID=5492
Here is the text copied in, from the Xrite answer online:
Date Created: 6/15/2011 Date Modified: 2/29/2012
+Software Freezes or Crashes During Initial Patch Measurments
If ColorMunki Display or i1Profiler software freezes or crashes while measuring the first couple patches on the screen during display profiling, Automatic Display Control (ADC) could be the cause. Please use the following instructions to turn off ADC in these programs:
ColorMunki Display: Open the program. Select “File” in the upper left and then “Preferences” from the dropdown. Uncheck “Enable ADC”, click on “OK”, restart the program, and create a display profile.
i1Display Pro: Open i1Profiler. During profile creation, make sure to uncheck the “Automatic Display Setup (ADC)” option in the “Display Hardware Setup” portion of the “Measurement” workflow step.
There is also a similar answer for Macintosh below the windows one, on the Xrite site.