Adobe never released an official portable version. Any “CS4 Portable” you find online is an unauthorized, hacked, or repackaged copy — usually created by third-party groups. These are pirated software and violate Adobe’s license terms.
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The "ME" edition was specifically designed to handle the complexities of Arabic, Hebrew, and other Middle Eastern scripts that require right-to-left text direction and context-specific character shaping. Adobe never released an official portable version
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