_ExcelBookSaveAs format XLSX (default workbook)

[slash.cyberpunk@…]

In beta 3.3.9.2 too.
Add const:

Global Const $xlWorkbookDefault = 51

Change in _ExcelBookSaveAs function in Excel.au3:
Before:

	If $sType = "xls" Or $sType = "csv" Or $sType = "txt" Or $sType = "template" Or $sType = "html" Then
		If $sType = "xls" Then $sType = $xlNormal
		If $sType = "csv" Then $sType = $xlCSVMSDOS
		If $sType = "txt" Then $sType = $xlTextWindows
		If $sType = "template" Then $sType = $xlTemplate
		If $sType = "html" Then $sType = $xlHtml
	Else
		Return SetError(2, 0, 0)
	EndIf

After:

	If $sType = "xls" Or $sType = "xlsx" Or $sType = "csv" Or $sType = "txt" Or $sType = "template" Or $sType = "html" Then
		If $sType = "xls" Then $sType = $xlNormal
	    If $sType = "xlsx" Then $sType = $xlWorkbookDefault
		If $sType = "csv" Then $sType = $xlCSVMSDOS
		If $sType = "txt" Then $sType = $xlTextWindows
		If $sType = "template" Then $sType = $xlTemplate
		If $sType = "html" Then $sType = $xlHtml
	Else
		Return SetError(2, 0, 0)
	EndIf

[TicketCleanup]

Automatic ticket cleanup.

[guinness]

This is currently in the beta v3.3.9.8.