Differences in the Paid Version of oCam and How to Register the Serial Number
This software is free for non-commercial personal use, so businesses and users using it for commercial purposes must purchase a license.
If you use it in a company, organization, public institution, educational institution, or PC cafe, please purchase a license before use.
There is no difference in functionality between the free and paid versions. All ads shown in the free version are removed in the paid version.
Of course, non-commercial individual users may also purchase it if they want to remove the ads.
After purchase, the serial number will be sent to you by email, and you can use the software after registering it as shown below.
[How to Apply the Serial Number]

As shown above, click the menu and select Register, then enter your email address and serial number and click OK. Authentication will proceed as shown below.

After a short wait, the registration will be completed successfully.

[Registered oCam Licensed Version]

This is the registered screen with the ads removed.
For reference, the ads that opened when exiting the free version are also removed in the paid version.
Today's News/Tips
What to Do If Sound Is Muffled or Too Quiet During Recording (Windows XP)
For Windows XP, normal operation may not be guaranteed because Microsoft has ended support for this operating system. (Reference)
Double-click the Sounds and Audio Devices icon in Control Panel.
The Volume Control window will appear. Click Options, then Properties.
Select Recording, then under Show the following volume controls, check "Stereo Mix" and click OK.
If the sound is muffled, lower the Stereo Mix volume. If the sound is too quiet, increase the Stereo Mix volume.
Since Stereo Mix is a feature provided by the sound driver, on some sound drivers the sound may still be quiet even if the Stereo Mix volume is increased. In that case, you should also increase the system volume.