The new Math-o-mir v1.83 can be downloaded from the homepage.
This is a debug release intended to align the distributed Math-o-mir version over various software download sites. The version 1.82 had many after-release builds that were only available at my site.
I also corrected a problem with typing differentials of indexed variables. Until now you couldn’t use the fast ‘spacebar+letter’ method to type the index of something like “dx1”. Instead you had to use the underline key to type the index down.