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1. all compressors i ever seen, had 32-bit and 64-bit versions compatible by the compression data, i.e. ypu can compress with x64 and decompress with x86 and vice versa - as far as it fits into memory available for program
2. i'm sure that you can google for official XZ site and download 32-bit version here
3. my FAZIP includes only algorithms internal to freearc itself, it's just external implementation of internal compressors. so, 32-bit and 64-bit fazip versions are compatible with each other as well as with internal freearc implementation of algorithms with the same names
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