Welcome, Eric! :)
There could be a ton of things to potentially troubleshoot. However, I have no clue how to troubleshoot XMod. You'll need to contact the vendor support for that part. This includes potentially upgrading the module, if possible.
In the meantime, I'd suggest performing some data maintenance. Be sure the amount of data is acceptable for your resources. Reindex and/or reorganize the indexes. Check to be sure the correct indexes are actually in place for the queries being made. Determine whether the amount of data being pulled for initial page loads is actually necessary (e.g., load pages of 10 instead of 100).
Also, I'm sure you know someone will mention it, but the more recent versions of DNN are much faster than 9.3.2. I'd suggest upgrading DNN ASAP for that and various security concerns.
There is more that can be done, but this should be a good starting point. :)