eQSL_Send field - revise all QSO's

[VE5SF]

Is there a way to update the eQSL_send field in all QSO's.  I have tried the "Set the QSL send indicator" under the Function menu however it does not work - or maybe I am not using it properly.  I am a new Swisslog user and have uploaded over 230,000 historical QSO's to eQSL over the last year or so, however other than confirmed QSL's, the eQSL field is blank.  I was able to update the LoTW_Send filed using the "Set the QSL send indicator" but for some odd reason the same for the eQS Send field.

Thanks
Sam
VE5SF