I'm upgraded Skype Portable from v6.5.0.158 to v6.6.0.106 on my fully patched Windows Home XP SP3 machine and now when I go to launch it, absolutely nothing happens. The splash screen doesn't even show up nor does it appear listed anywhere in the Task Manager. The previous version worked fine and I haven't made any modifications to any hardware or software on my system.
Does anyone have any ideas what the problem could be? If it can't be resolved, and because there's an online installer involved, is there any way to downgrade it to the previously installed version that worked?
Thanks in advance for any assistance.