Thank you for using our software library. The legal way for you to obtain the software is to contact the developer. It was available on their website when we last checked. We cannot confirm if there is a download of this software available. An attempt to download a free version of Proton IDE from unknown external sources may be unsafe and in some cases illegal. FDM Lib shall include an option for direct download from developers, should it become available in the future.
Purchase and download from www.mecanique.co.uk