Ok, thank you! I have been able to determine that the version is 6.5.0. So will there not be an upgrade to v 6.7.3 that I keep seeing mention of?
Also it seems if I have been understanding correctly, that there is no need to actually install the different versions, rather just to run a conversion/upgrade script?
I am hoping that a major part of the battle has been won by identifying the running version. smile

Do you know if I will be able to import from UBB.threads 7.5,6 which uses PHP v 4 directly to UBB.threads 7.7.0 which will support PHP 7? Our client will not be allowed to install any version lower than this as the server is running PHP 7.2 at this point.

One thing that I am kind of unclear on ... the client was running UBB.classic 6.5.0 and our server was running PHP 5.6, so it is not making sense to me that UBB.threads 6.x would require PHP 4 ... can you elaborate?

Again, I appreciate everyone's assistance. smile