This was beta-tested prior to launch and we couldn't find any issues. Because this is such a critical thing I went back over everything just to be sure.

When coins are term deposited they are waiting for the block chain to reach the maturation block. Once the blockchain reaches the maturation block the term deposit is completed. The coins plus the value gained will all be automatically returned to your "Available" line under "Balances" in the upper left hand corner. You won't need to take any steps to get your term deposits unlocked and added back to you available balance.

Down low in the wallet in the "ROIcoin Term Deposits" section and as you noted you'll see: Matured (Warning: this amount is no longer earning interest of any kind). This means the term deposit is completed and it is noting to you that that term deposit is no longer earning profit and this is because it has completed. The line item for the term deposit in the table will remain there as a record of the term deposit.

This is easy to test. You can make a term deposit of 10 coins for 5 blocks. You'll then see that your Available balance went down by 10 coins. Once the blockchain moves 5 blocks you'll see the term deposit is matured and no longer earning interest and then you're available balance will increase back the 10 coins plus the interest you made.

Please let me know if this doesn't make sense or if you have any questions...