ALEPHNULL  There was a bug in early Sente 6 releases that caused excessive CPU load after a search was performed. This was fixed in 6.0.17.  
(Version 6.0.17)

ALEPHNULL  There was a bug in early Sente 6 releases that caused excessive CPU load after a search was performed. This was fixed in 6.0.17.  
(Version 6.0.17)

ALEPHNULL  We routinely renew the demo period on request. Just send your request to our support address, which can be found on our web site.  
(Version 5.6.3)

ALEPHNULL  Sente 5 now does citations in footnotes in MS Word (it has worked in Mellel for some time). In addition, Sente 5 can now scan RTF files from most word processors, and it handles citations in footnotes in RTF as well. (Sadly, scanning RTF from Pages only partly works, and does not handle footnotes, due to Pages non-standard RTF usage.)

There are many other bibliography-related improvements in Sente 5, so if this matters to you, you might want to check out the current version.  
(Version 5.0.19)