Problems with attributes in gform

Hi, this is a great plug-in, thanks so much. Fixes a lot of issues I have had with styling in the past. My only problem is that none of the attributes I add into the gform code take effect — I was specifically hoping to use the alert or confirmation page, but neither of those, nor legal=’off’ are working. I am not using brackets in the values, and am using single quotes. I downloaded version .45. Any ideas? Thanks!

https://www.ads-software.com/extend/plugins/wpgform/