Error on first run

[PharmCat]

When another version of R installed:

Traceback (most recent call last):
  File "win_prelaunch.py", line 29, in <module>
  File "launch.pyc", line 54, in start
  File "launch.pyc", line 24, in load_R_libraries
  File "meta_py_r.pyc", line 57, in load_metafor
  File "meta_py_r.pyc", line 80, in _load_r_lib
Exception: The metafor R package is not installed.
Please install this package and then re-start OpenMeta.