Do you have a project you’re trying to open that relies on those versions?
Even though the GitHub doesn’t have the updated 0.24 files it does have the change log from 0.23: two expressions and a fix. You could update it to a 0.24 release yourself.
It’s simple enough to change the version to 0.24 and add the two expressions to the plugin. I’d imagine they have two number parameters for x and y. You’ll have to guess the ids of the expressions unless you have a project that uses them, in which case you can find the ids in the event sheet xml file. But if you had to guess I’d imagine they were 0 and 1 based on how the actions are numbered. That would at least let you open your project and be compatible with the real 0.24 release.
Implementing the js side of the expressions should be simple enough.
The fix for “block using object” would be the most involved, but not too bad. At a glance the plugin uses a 2d array to store the cost of cells and if they are blocked. When it uses an object to block it loops over all the cells that overlap the objects bounding box and sets them. So I’d assume there was a simple typo or oversight in 0.23 that needed correcting.