Try the newest release, hopefully that should be fixed along with the pocket loading problem and some other things.
Version 22.214.171.124 Download
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* Fixed error trying to open pocket worlds
* Fixed crash in chunk view
* Fixed log rotations not working
* Fixed title translations
* Fixed issue with translations when using Forester and Create Shops filters
* Scrollbars are more reactive
* Very small scroll bars can now be dragged
I am unable to get to the download page for MCEdit 1.
Whenever I try I get a DNS failed to resolve error. Do you have a mirror link?
Screencap of error
Never mind, found this site, http://www.mcedit-unified.net/