concept version

Hello dears,
i know it is very boring question in 2024 asking for concept software and its version but i have problem and i need some help
i have quantum Old PLC with factory link old software and i only have some zip files which have extension format like C1,C2,.... and .PRJ and i need to find codes of PLC to try to do engineering and upgrade to new PLC system, i tried to open in Concept 2.6 XL but i think the program is not in same version due to mismatch error, i think i have to open project in earlier version and convert to .ASC and use it in Unity pro, but i can not find v2.2 and nobody has it either, is there anybody have the software to help me out.
 
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