If you specifically need version 3.4.5 to open old project files, you may find it on software archives like Software Informer
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For teams that have used Label Gallery for a decade, the 3.4.5 interface is "muscle memory," reducing the need for new training. How to Find the SATO Label Gallery Free 3.4.5 Download sato label gallery free 345 download top
An intuitive, paid option for Mac and Windows that supports SATO printers without requiring internet access. If you specifically need version 3
: Multilingual interface supporting English, French, German, Italian, and Simplified Chinese Graphics & Text the 3.4.5 interface is "muscle memory