Employee File IIF - Open in Excel to make pay rate changes - import IIF back to Reckon

I have used the method to export the employee file in IIF, open in Excel & adjust pay rates. Save as IIF then report back into Reckon for many years.

I have just tried this year & it seems that excel is changing the data file on save & reckon is not accepting the updated file. I have had our tech support look into this & we have tried different 'save' options but still no luck.

Has anyone else been successful with this method recently? Or ran into a similar issue & has a suggested work around?

400 employees with 21 different pay rates = 8400 manual entries (no thanks!)