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Unpack your downloaded ISTA 4.39.20 archives using 7-Zip or WinRAR. Run the Installer/Reg Fix: If your package includes an unblock.reg prerequisites.reg file, run it first to prepare the Windows Registry. Core Installation: Run the main setup file (often ISTA_v4.39.20.msi Database Placement: (Global, Language, and Other) into the Rheingold\SQLiteDBs
Before running the main installer, you must install necessary support files found within the extracted package folder (often in a "Tools" or "Prerequisites" folder): Install the latest Java Runtime Environment. ista 4.39.20 install