2.4.0: Framework and .NET 6

This releases features DLLs for .NET Framework 4.8 and .NET 6 (Windows and Linux).

Use better masking of protected byte arrays in memory

This release features a better obfuscation of the protected credentials in memory.

More structure and better suited exception

. Fixed some error messages
. Corrected naming of some methods and improved error handling
. Clearer structure of getting the encryption parts from string
. Corrected exception for Base32Encoding

Made usage of SyncLock consistent

Made usage of SyncLock consistent,

First public release

This is the first public release of the .Net version of TUPW.