Downloading Dlubal RX-TIMBER 64-bit 2.4.58 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. PRM64.exe or RX-TIMBER64.exe are the common file names to indicate this program's installer.
We recommend checking the downloaded files with any free antivirus. The most popular versions among the program users are 2.4, 2.2 and 2.1. This program was originally designed by Dlubal Software. The program lies within Photo & Graphics Tools, more precisely 3D Design.
From the developer:
RX-TIMBER is a DLUBAL program family that meets specific demands in timber engineering. With the programs included in the RX-TIMBER package you can design glued-laminated beams, continuous beams, columns, frames, purlins and bracings. The governing result combinations are created automatically with the add-on module RF-COMBI that is integrated in RX-TIMBER.
You may want to check out more software, such as Dlubal SHAPE-THIN, Dlubal RFEM or Dlubal SHAPE-MASSIVE, which might be related to Dlubal RX-TIMBER 64-bit.