[R] Problem launching Rcmdr

[Brian Grossman]

I'm having a problem with launching Rcmdr. When I try to launch it the
first time through R using the command library(Rcmdr) it will go through
the process of launching and get to the point where it says

"Registered S3 methods overwritten by 'lme4':
  method                          from
  cooks.distance.influence.merMod car
  influence.merMod                car
  dfbeta.influence.merMod         car
  dfbetas.influence.merMod        car
lattice theme set by effectsTheme()
See ?effectsTheme for details."

and then it just hangs there and never launches Rcmdr. If you launch
another instance of R and run the same command it will complete and launch
Rcmdr successfully. I have tried launching R with R.exe --vanilla with the
same results.

The system information is Windows 10 version 1903, i5 8500 processor, 8GB
RAM, 256Gb  SSD. R version 3.6.2 Platform: x86_64-w64-mingw32/x64 (64-bit)

Hopefully I haven't left out any important information. Thank you for any
suggestions.

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