I am running PrePoMax v1.4.0 with Linux, opening the program with Wine. It is working well except for a few issues with display of text under the FE Model tab. This may be due to .Net Framework 4.8 unable to be installed as it is a Windows-only framework. Does v1.4.0 work under .NetFramework 5 which is designed to be cross-platform and can run on Linux operating systems?
The PrePoMax is based on Net Framework, which is not the same as .NET5 or later, which is indeed multiplatform. I could probably try and change the backbone of the PrePoMax from Net Framework to .NET5 and it will work for most parts of the software. The problem could arise in the 3D view control which is a Windows version of VTK and in the Netgen mesher, which is again a Windows compiled executable. So I think PrePoMax in .NET5 would also not work in Linux directly (I might be wrong).