Historical versions, such as Modelio 3.4.1 and earlier, were the last to provide native 32-bit support for Windows and Linux. Where to Download Modelio 32-Bit
If you are running a 32-bit operating system, you must use an older release of the software. Modelio Open Source - UML and BPMN free modeling tool modelio download 32 bit
These latest releases are exclusively 64-bit . Historical versions, such as Modelio 3