More like a 2 year gap, this happened in the fall of 2014. Trezor, ok new to me I will check it out. I never had problems sending small amounts, it was the large amount that got snatched.
 I hoped that there might have been some fix in a software glitch that would have brought my coin back. I can still access the wallet. Check the GPG OK, how do I do that? The old wallet seems to work with the recent updates, and newer versions of Electrum.