This is SKPF 4.3.268.0, purchased version.

The "debug log" contains 1,963 KB of data after only 6 days since I installed the purchased version. Question:

Is this just going to grow and grow?? Do I need to clean it out now and then?

The following entries appear every 5 minutes which I believe contributes immensely to the large volume of data in the log:

[04/Nov/200606:40:15]RegistrationManager.cpp:
RegistrationManager::DetermineExpirationInfo: Entry...
[04/Nov/2006 06:40:15] RegistrationManager.cpp: RegistrationManager::DetermineExpirationInfo: Installed Date: 2006-10-30T15:31:35Z
[04/Nov/2006 06:40:15] RegistrationManager.cpp: RegistrationManager::DetermineExpirationInfo: Expiration Date: 2007-10-29T00:00:00Z
[04/Nov/2006 06:40:15] RegistrationManager.cpp: RegistrationManager::DetermineExpirationInfo: Exit: License Expired: false, Trial Expired: false, About to Expire: false, About to Expire Days: 0

What's going on? Is this normal?

I wouldn't worry too much about the size of the log . The debug.log contains alot of detailed information about the running of SKPF4, which could be usefull when troubleshooting. It is fine to delete the contents how and again but as this log isn't shown within SKPF4, it shouldn't affect performance.