I used this previously a month or so ago, and I am glad to find that the latest version works fine with SpongeForge 1212. I just found a few things that could use some tweaking:
1) If the block was paced before adding Inspector, it will not show the logs for it, but also punching the block with the toggle will break the block.
2) It seems that large worldedit commands involving water and lava make Inspector flood console, greatly spiking the lag and even timing it out in certain situations.
3) When doing
/inspector rollback time player, I have found that it won't actually rollback anything, even though it does say it has... Removing the name of the player won't matter either.
Let me know if you wish me to do more testing, I have only been around this for an hour or so - I might fail to catch onto some things!