Hi – thanks for your patience so far.
We couldn’t progress very far as a license key seems to be needed before the plugin actually does anything, and so assessing it was encumbered by this.
What we could see though is that it adds custom rewrite rules. At this point then it looks like it may simply be a conflict similar to others where plugins add their own rewrite rules and (inadvertently) wipe those rules generated by WordPress in relation to custom post types – events being one such type.
Really there isn’t much we can do about this on our side and at this time the best advice is to continue progressing this with the vendors of the other plugin.
Sorry we can’t offer more on this occasion.