Here are potential reordered and simplified versions of the text:
Version 1 (17 words max):
The RDATA file format is created by the R Foundation. RDATA files store data from the R statistics program. To open RDATA files properly, update to the latest version of R. Earlier versions of R may not support the format. Check the R Foundation website for available upgrades. Problems opening RDATA? Make sure to associate RDATA files with the correct R software.
Version 2 (14 words max):
The RDATA format stores data from R software. It’s created by the R Foundation for statistics. To open RDATA files, use the latest R software. Previous versions may not support the current format. Check the R Foundation website for updates. Associate RDATA file extension with the right R program to fix open issues.
Version 3 (12 words max):
RDATA file format is by the R Foundation. It stores R program data. Need current R to open. Previous versions may not support. Find updates at R website. Link RDATA files to correct R software to fix problems.
R Language
RStudio
Microsoft R Open