The action can't be completed ...

[theSEMAR]

i found that's @dueda suggestion is very usefull to me too...
@Cov, thank's for make this thread. because this thread, now i know "Sumatra PDF". i was stuck with Adobe Reader and Adobe Digital Editions for long time, he..he..

but i have question, why stable release 3.1.2 from 14 August 2016 (2 years ago), no new update?

[Cov]

I used the Adobe Reader as well. The reason I changed to Foxit a few years ago was because people said it was considerable lighter. I was using Bibliovore for ePub files, but this app takes ages to load any document. The Icecream Reader is much faster but looking at Sumatra now, it beats all of them.

[dueda]

Looks like the developer (Krzysztof Kowalczyk) has little time for his pet projects (including Sumatra). Also the idea is to keep it light and simple, so I guess he won't see fit in updating it regularly: If it's not broken, don't fix it.