Do I have to convert my Concept 2.5 project to Concept 2.6?

Applications created with Concept 2.5 SR2 or later are directly compatible with Concept 2.6 SR1 or later.
No program conversion is necessary.
Applications created with older versions of Concept (V1.x or V2.x) can be maintained under Concept 2.6 SR1 or later after being
converted using the included Concept Converter tool.