What did you use to write the installer, and how do you determine if the targeted version of Excel is 32 or 64 bit?
I've built an Excel-DNA based Add-in (https://www.excelpricefeed.com/) and distribute it via an installer built using Advanced Installer. It works well, the only real pain point is the the user has to find out which version of Excel they have installed in order to choose the correct download (32 or 64 bit).
I use Wix for the installer. Can't remember how I dealt with that particular issue, but ping me at antonio [at] querystorm.com in a day or two, if you're interested, and I'll have a look at how exactly I dealt with it.
I've built an Excel-DNA based Add-in (https://www.excelpricefeed.com/) and distribute it via an installer built using Advanced Installer. It works well, the only real pain point is the the user has to find out which version of Excel they have installed in order to choose the correct download (32 or 64 bit).