David Vogelaar (and others) kindly reported a bug: I wasn’t converting invalid filename characters when using an SQL Server instance name for the auto-generated results filename. This has been fixed. You can download version 1.0.2 from the previous download links or the ones below.
There is a known issue:
The results file is generated OK but sometimes when you open it in Excel a seemingly ‘nasty’ message is shown:
"Excel found unreadable content in ‘???.xlsx’. Do you want to recover the contents of this workbook?"
The file will open OK if you chose to recover: simply accept the prompts and save over the original. I will fix as soon as I can.