HPE has once again changed the way that you access the add ins. You can use the following link to get to the HPE Marketplace where you can download add ins
According to the new HPE Market Place ( https://marketplace.saas.hpe.com/appdelivery/content/microsoft-excel-add )...
The following versions of Excel are supported by the 11.52 Excel add in
Excel Versions Supported
Microsoft Excel 2016 (32 bit) (with ALM 11.52 patch 8)
Microsoft Excel 2013 (32 bit)
Microsoft Excel 2010 (32 bit) SP1 (with MS12-060)
You can also download the excel addin from the above link.