How to open .R21 file extension?

If you cannot open a new file that has been saved in the .R21 format you need to download the appropriate software. The manufacturer of .R21 files is Eugene Roshal; .R21 files belong to the Compressed Files category. After downloading the application from the list available on our website just run an unknown file, and as the default set the newly installed application supporting the .R21 files. Activities performed in the order described should solve the problems with all the files in the .R21 format.

• What is .R21 file?
• How to open .R21 file?
• What is .R21 file?