When you run adcrutil with the option "-exportformat=xlsrecord", Report Commander produces normal Excel output as if you had used "-exportformat=xls".
This problem was previously fixed (see CR00007307), but due to a procedural problem the wrong version of the affected component was included in the 2.6 release.
Download K00000578.zip. Make a backup copy of "ArcanaDevelopment.CommandLineParser.dll" in the Report Commander program folder, then replace that file with the version from the ZIP.
Report Commander 2
This issue has been corrected and the fix will be included in the next maintenance update or software release. Customers affected by the problem may contact us to obtain the fix now.