Mac App Store stack application not starting up

I got BitNamiStackWordPress and MampStack applications from App Store on OS X 10.8.2. At first they worked, but now when I go to launch either one it immediately shuts down. I can only find some kind of error message in the console:

com.apple.launchd.peruser.501[240]: ([0x0-0x4a04a].com.bitnami.wordpress[529]) Exited with code: 1

Any tips on how to troubleshoot?

UPDATE

Selected application, view info (⌘+i), check "Open in 32-bit mode"...

BitNamiStackWordPress: application launches OK.

MampStack: get error (in form of popup, apparently from AppMain.tcl)...

lopen(/Applications/MampStack.app/Contents/Resources/Scripts/lib/cocoa/libcocoautils1.0.dylib, 10): no suitable image found. Did find: /Applications/MampStack.app/Contents/Resources/Scripts/lib/cocoa/libcocoautils1.0.dylib: mach-o, but wrong architecture invalid command name "::bitnami::util::debug" while executing "# Compiled -- no source code available error "called a copy of a compiled script""

Uncheck "Open in 32-bit mode" and execute MampStack; from console:

com.apple.launchd.peruser.501[239]: ([0x0-0x82082].com.bitnami.mampstack[754]) Exited with code: 1

Output from uname -a:

Darwin MacBookPro.local 12.2.0 Darwin Kernel Version 12.2.0: Sat Aug 25 00:48:52 PDT 2012; root:xnu-2050.18.24~1/RELEASE_X86_64 x86_64

Output from otool -L /Applications/MampStack.app/Contents/MacOS/BitNamiApp:

/Applications/MampStack.app/Contents/MacOS/BitNamiApp: /System/Library/Frameworks/Tk.framework/Versions/8.5/Tk (compatibility version 8.5.0, current version 8.5.9) /System/Library/Frameworks/Tcl.framework/Versions/8.5/Tcl (compatibility version 8.5.0, current version 8.5.9) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 159.0.0) /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation (compatibility version 150.0.0, current version 629.0.0) /System/Library/Frameworks/Cocoa.framework/Versions/A/Cocoa (compatibility version 1.0.0, current version 17.0.0) /System/Library/Frameworks/Carbon.framework/Versions/A/Carbon (compatibility version 2.0.0, current version 153.0.0) /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit (compatibility version 1.0.0, current version 275.0.0)

kernel_task kind is Intel (64 bit)