About the first problem: is there a reference to a plsqldev.elf file in the error message? If so, can you send it to support@allroundautomations.com?
About problem 2: Can you go to Configure > Object Browser Filters, select the "My invalid objects" filter, go to the "Order by clause" of the filter, and change it to:
decode(o.owner, user, 0, 1),
o.owner,
o.object_name