January 8, 2024

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Download the latest windows installation package, which is named as follows:

AstroImageJ_vN.N.N.NN-windows-x86_64Bit.exe

Run the installation exe file and follow the instructions.

Run AstroImageJ by double-clicking AstroImageJ.exe, or the link that was optionally created on the desktop (the link can be placed on the task bar or start window). DO NOT run AIJ by double-clicking ij.jar.

After starting AstroImageJ, use the AstroImageJ Update feature at AstroImageJ_Toolbar > Help > Update AstroImageJ to install any recent updates.

Optional: AstroImageJ defaults to allowing access to up to 75% of your physical system memory (part of your systems memory needs to be reserved for the operating system and simultaneously running other programs such as email, browsers, etc). It is not recommended to make more than 75% of system memory available to AstroImageJ (AstroImageJ will only use the amount of memory that it needs), but if you desire a smaller or larger custom memory setting, go to AIJ_Toolbar > Edit > Options > Memory & Threads and enter the amount of memory in MB that you want allocated to AIJ. For example, if your machine has 64 GB of memory, enter a memory size up to ~50000 MB. Click "OK" and close AIJ. When AIJ is restarted, you will be running with the new memory setting.