Update README: Pre-Release binaries available

Author: stefanfis

README.md

@@ -27,13 +27,16 @@ Originally released in 2017 as a commercial app, Tablecruncher is now fully open
 
 ## Download
 
-At the moment, only the **previous commercial version for macOS** is available as a prebuilt binary:  
-**[tablecruncher.com/download](https://tablecruncher.com/download/)**
+Prebuilt binaries of the newly open-sourced Tablecruncher v1.8-beta1 are now available for:
+
+- macOS (ARM)
+- Windows (x86_64)
+- Linux (x86_64)
 
-The newly open-sourced version is currently available as **source code only**.  
-Prebuilt installers for macOS, Windows, and Linux will be published soon.
+You can find them under [Releases](https://github.com/Tablecruncher/tablecruncher/releases).
 
-_Building and testing binaries across all supported platforms takes a bit of time — thanks for your patience!_
+If you're looking for the previous stable version (v1.7) for macOS (ARM and Intel), it's still available at:  
+**[tablecruncher.com/download](https://tablecruncher.com/download/)**
 
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