eM Client is slow

After creating Email templates, eM client is become very slow. It takes almost half minute to show text if I open New  - > Email-> Template . I used default Font Book Antiqua with font size 12. One Table to show my signature.

If you remove the table and signature, does it revert to normal speed?

No, it did not effect. I tried it but no use. I have also repaired rebuild DB with the utility provided by eM client also no use.

And it runs normally with no template?