SQL Server LicenseType is disbled
If you read official documentation of Serverproperty (T-SQL), it says

LicenseType:   Unused. License information is not preserved or maintained by the SQL Server product. Always returns DISABLED.
NumLicenses: Unused. License information is not preserved or maintained by the SQL Server product. Always returns NULL.

SQL Server does not stores license information anywhere inside its mostly on paper or in some kind of agreement between you and Microsoft or you and Vendor who is providing the software copy. Having said that you can get very limited information when you run select @@version

Any idea how can I change LicenseType of SQL Server?

You simply cannot unless you buy a totally different license.
PS:Dont worry your SQL Server installation is fine