In an older model of RFEM 4 or RSTAB 7, I designed a SHAPE‑THIN cross-section or a general cross-section in STEEL EC3. At that time, cross-section Class 1 or 2 was determined. Now, I have opened the model in RFEM 5 and the cross-section is only classified as Class 3 or Class 4. Why? Was the design more cost-efficient at the time?
I would like to download the RFEM and RSTAB installation packages. However, the download crashes over and over again. Is the Dlubal Software web server broken?