I understand you made a mistake and wanted to write: "Now I have..."?
There is no straight answer to your question because we don't have all info needed. Which wallet version are you using? This same wallet on both computers, same dat.file? When installed after chain split? Used blockchain file for faster sync? Do you know about the latest update after kind of chain split problem? Etc.
Still, if I know all answers there is a big chance that I'll be not able to help you. But here are smarter guys than me and maybe with this all details, they will be able to help you. I have seen errors in different crypto wallets and some of them never get resolved.
I am using wallet v2.0.0.0-61402. I see there is an update on the OP to version V2.1.0.0 but the zipped file doesn't open on my PC. It must be compressed with some later version of zip program which I am not planning to buy. The dev should make it more easily available and compress it with a program which everybody has.
WTF! We are complaining about scarce user adoption which has lead MTNC to lose over 90% of its value and then the dev is making it difficult to people to download the wallet? This is soooo stupid. I have no words.
Instead of acting stupid, use Google. 7zip. Free. Powerful. Does everything. Stop whining and rethink your attitude.
https://www.7-zip.org/
Instead of speaking stupid, learn the meaning of words. I am not whining nor it's about my attitude. It's about user-friendliness, usability and marketing of MTNC, which are key factors for user adoption of a cryptocurrency in a crypto-space which is densly populated with concurrent coins. You must make things EASY for adopters, not DIFFICULT. Provide solutions, not problems.
Finally, thanks for the advise.