Rterm.exe Entry Point Not Found

Hi there!

I recently had a common problem with "Rterm.exe Entry Point Not Found" after updating from R 3.4 to R 3.5, when trying to use the older R 3.4 version again in RStudio (selecting the updated R 3.5 version in RStudio did not show any error message).

When trying to load the packages "readr" and "Rcpp" with the older R 3.4 version, one gets the following error messages (s. below), that point to a problem with the 'Rcpp' package version/built, that seemed to be on the new 3.5 built. Reinstalling the "Rcpp" package using R 3.4 solved the problem.

library(readr)
Error: package or namespace load failed for ‘readr’ in inDL(x, as.logical(local), as.logical(now), ...):
unable to load shared object 'C:/Users/kvasg/Documents/R/win-library/3.4/Rcpp/libs/x64/Rcpp.dll':
LoadLibrary failure: The procedure could not be found.
library(Rcpp)
Error: package ‘Rcpp’ was installed by an R version with different internals; it needs to be reinstalled for use with this R version