[rap-dev] License conversion from GPL to EPL?

[Austin Riddle <austin.riddle@xxxxxxxx>]

Hello,

This may be a moot point, but can the same piece of software have 2 
incompatible licenses? If the inqle visualizations were released 
previously as GPL and the owner of the copyright changes the license to 
EPL (which I assume is as easy as just changing the code and docs), 
where does that leave the previous users of the software that started 
using it under GPL?
Can the original still exist in parallel to the EPL version? How does 
that impact Eclipse?

Thanks,
Austin