The most probably choice for a wve to wma conversion seems to be the export of Wondershare Video Editor projects (.wve) as WMA format (audio only). If you looking for this conversion, then you can do that in the program using the default export function. Wondershare also offers trial version, so it may be worthwhile to check the program if you are attempting this conversion.
Convert PowerDirector WaveEditor project to Windows Media Audio.
We found one software available in the database for this conversion.
Microsoft Windows software - convert wve to wma on Windows
Suite of tools for video editing
Convert from wve file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.