Which Excel is needed for SAP Business Objects Dashboards ?

We want to purchase this product. However, I have had a problem when I installed the trial version. It would not install if I did not have on my PC

the 32 bit Excel. So I had to uninstall 2013 excel and then install 2010 32 bit.

Even with this, there is constant conflict message. Once I load the XLF file and preview or create SWF, After this there is some excel error message that never disappears.

THis makes us nervous about this product.

I am looking for reassurance that if we purchase actually, we can use 64 bit excel and there won't be such issues.