Here's my version Bitcoin Core version v0.9.1.0-g026a939-beta
Where do I put in the command line?? So sorry to bug you with this, I'm not stupid (I don't think......) but it always just worked before........
Depends on what OS you're using.
For windows the fastest way is to press Win+R and type:
"C:\Program Files (x86)\Bitcoin\bitcoin-qt.exe" -zapwallettxes
Change the path if you installed the wallet somewhere else. If you're using other OS then post it.
BTW that's a really old version, I'd suggest you find a time and update it.