I am having difficulty, and I cannot find someone to help

I initially had no difficulty opening books on this platform, but then started getting messages after the program "quit unexpectedly".

The messages are long, and I cannot open the text. I have a Mac. The link comes from a university where I am taking courses, and is valid.

Can someone help me??

The messages look like this:

Process:         Adobe Digital Editions [2257]

Path:            /Applications/Adobe Digital Editions 4.0.app/Contents/MacOS/Adobe Digital Editions

Identifier:      com.adobe.adobedigitaleditions.app

Version:         4.0 (1)

Code Type:       X86-64 (Native)

Parent Process:  launchd [140]

User ID:         503

Date/Time:       2014-12-13 21:42:20.507 -0500

OS Version:      Mac OS X 10.8.5 (12F45)

Report Version:  10

Interval Since Last Report:          8859 sec

Crashes Since Last Report:           11

Per-App Interval Since Last Report:  2663 sec

Per-App Crashes Since Last Report:   11

Anonymous UUID:                      EB1BE9EC-AFB2-D1DA-04F1-913885F6FB03

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

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)

Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000000

VM Regions Near 0: