A few key points for you:
Simple, fast editing and diagnostics for ladder logic.
Several reputable PLC software resellers provide LM90 on CD/DVD or as a ZIP download for a fee (typically $50–$200). They often pre-patch the software for Windows 10/11. Examples include:
Standard legacy installation media files grouped into a compressed folder (such as LM90_XP.zip or LM90_9.05_Special.zip ).