In version 2.8.0 I encountered the problem that the program doesn't open jpg !!! files. Searching for the solution, this is a diffused problem and I solve installing the 2.8.1 unofficial version on http://www.partha.com/ page.
Now in new 2.8.2 release the problem is still present !!!
OK, this is a free and open source program, but an error opening the major used file type, is a shame !