Crash on opening chm file

[GoogleCodeExporter]

Platform:
Mac

What steps will reproduce the problem?
1. just simply opening chm file
2.
3.

What is the expected output? What do you see instead? crash. Asks whether to 
reopen app


What version of the product are you using? On what operating system?
Process:         iChm [647]
Path:            /Users/USER/Downloads/iChm-2.app/Contents/MacOS/iChm
Identifier:      com.robinlu.iChm
Version:         1.4.3
Code Type:       X86 (Native)
Parent Process:  launchd [152]
Responsible:     iChm [647]
User ID:         501

Date/Time:       2014-10-11 08:17:09.399 +0100
OS Version:      Mac OS X 10.9.5 (13F34)
Report Version:  11
Anonymous UUID:  7387FD5B-8B44-EAB4-2F66-A478291053A5


Crashed Thread:  0  Dispatch queue: com.apple.main-thread



Please provide any additional information below.

Original issue reported on code.google.com by szrugonf...@gmail.com on 11 Oct 2014 at 7:18